diff --git a/.gitignore b/.gitignore
index 34ac40c..16a444c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
 ontraport.sublime-project
 ontraport.sublime-workspace
 *.gem
-/doc/*
\ No newline at end of file
+/doc/*
+.idea
+.ruby-version
\ No newline at end of file
diff --git a/.yardoc/checksums b/.yardoc/checksums
index 381a7f7..61b18cc 100644
--- a/.yardoc/checksums
+++ b/.yardoc/checksums
@@ -1,5 +1,5 @@
-lib/ontraport.rb b594b805dde3c592fd7cbad36b2c4669b73b26e7
-lib/ontraport/version.rb 91989823b1c7e27b077df5cbfa78e912fd7e9400
-lib/ontraport/response.rb a6560cd7c27414b42d2070db67f466f8e1be050e
+lib/ontraport.rb 306376bf02a3e2270837fc52572b60bf15ea4405
+lib/ontraport/version.rb 13bacfd933f7b6f9cd998cabbcaba4ce15fd9ea2
+lib/ontraport/response.rb 29aed67b1e4f4f54a179c11680e19df0cbf4de77
 lib/ontraport/exceptions.rb 2847613063c8f69f5c22a2a19b8e445b66075729
-lib/ontraport/configuration.rb c0cecf8a66acf72e84d7c97e89f602a92a6f8f21
+lib/ontraport/configuration.rb 3c1a8c931b393a146d44360862182f69173c282b
diff --git a/.yardoc/object_types b/.yardoc/object_types
index c2a3c53..f9d1146 100644
Binary files a/.yardoc/object_types and b/.yardoc/object_types differ
diff --git a/.yardoc/objects/root.dat b/.yardoc/objects/root.dat
index 3af0c01..a9a2a11 100644
Binary files a/.yardoc/objects/root.dat and b/.yardoc/objects/root.dat differ
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ef68db..2f9e8f2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Unreleased
 
+- Added new method `add_subscription` for objects
+- Added new configuration option `debug_mode` 
+    adds value `original_request` to response data
+
 # 0.1.21 - September 6, 2017
 
 - require HTTParty in main module (fixes #1)
diff --git a/lib/ontraport.rb b/lib/ontraport.rb
index 5ffeb96..234f84e 100644
--- a/lib/ontraport.rb
+++ b/lib/ontraport.rb
@@ -153,6 +153,54 @@ def self.untag_objects object_type, object:, tag:
     objects_call :delete, object_type, endpoint: '/objects/tag', data: params
   end
 
+  # Add a subscription to an object.
+  #
+  # @example
+  #   Ontraport.add_subscription :contact, 12345, [150,200], "Campaign", { range: 5 }
+  #   #=> #<Ontraport::Response @data=...>
+  #
+  # @see https://api.ontraport.com/live/#!/objects/addSubscription API docs
+  #
+  # @param object_type [Symbol] the type of object
+  # @param ids [Array, Integer] id or array of ids of objects to subscribe
+  # @param add_list [Array, Integer] id or array of ids of Campaigns or Sequences to subscribe the object to
+  # @param sub_type [String, nil] possible values are "Sequence" or "Campaign" defaults to "Campaign"
+  # @param params [Hash, nil] extra stuff to add to request data. Use +.describe+ to get a list of available fields.
+  # @return [Response]
+
+  def self.add_subscription object_type, ids, add_list, sub_type = 'Campaign', params = {}
+    objects_call :put, object_type, endpoint: '/objects/subscribe',
+                                    data: params.update(
+                                      ids: Array(ids).join(','),
+                                      sub_type: sub_type,
+                                      add_list: Array(add_list).join(',')
+                                    )
+  end
+
+  # Remove a subscription from an object.
+  #
+  # @example
+  #   Ontraport.remove_subscription :contact, 12345, [150,200], "Campaign", { range: 5 }
+  #   #=> #<Ontraport::Response @data=...>
+  #
+  # @see https://api.ontraport.com/live/#!/objects/addSubscription API docs
+  #
+  # @param object_type [Symbol] the type of object
+  # @param ids [Array, Integer] id or array of ids of objects to subscribe
+  # @param remove_list [Array, Integer] id or array of ids of Campaigns or Sequences to unsubscribe the object to
+  # @param sub_type [String, nil] possible values are "Sequence" or "Campaign" defaults to "Campaign"
+  # @param params [Hash, nil] extra stuff to add to request data. Use +.describe+ to get a list of available fields.
+  # @return [Response]
+
+  def self.remove_subscription object_type, ids, remove_list, sub_type = 'Campaign', params = {}
+    objects_call :delete, object_type, endpoint: '/objects/subscribe',
+                                       data: params.update(
+                                         ids: Array(ids).join(','),
+                                         sub_type: sub_type,
+                                         remove_list: Array(remove_list).join(',')
+                                       )
+  end
+
   # @!endgroup
   # @!group "Transactions" Methods
 
@@ -167,35 +215,44 @@ def self.get_order order_id
   end
 
   # @!endgroup
+  #
 
   private
-    def self.request_with_authentication method, endpoint:, data: nil
-      data_param = method.eql?(:get) ? :query : :body
 
-      args = [method, "#{BASE_URL}#{API_VERSION}#{endpoint}"]
-      kwargs = {
-        :headers => { 'Api-Appid' => @configuration.api_id, 'Api-Key' => @configuration.api_key },
-        data_param => data
-      }
+  def self.request_with_authentication method, endpoint:, data: nil
+    data_param = method.eql?(:get) ? :query : :body
+    request_content = data_param.eql?(:body) ? data.to_json : data
 
-      response = HTTParty.send *args, **kwargs
+    args = [method, "#{BASE_URL}#{API_VERSION}#{endpoint}"]
+    kwargs = {
+      :headers => { 'Api-Appid' => @configuration.api_id,
+                    'Api-Key' => @configuration.api_key,
+                    'Content-Type' => 'application/json' },
+      data_param => request_content
+    }
 
-      unless response.code.eql? 200
-        error = "#{response.code} #{response.msg}"
-        raise APIError.new(response.body.present? ? "#{error} - #{response.body}" : error)
-      end
+    response = HTTParty.send *args, **kwargs
 
-      Response.new **response.parsed_response.symbolize_keys
+    unless response.code.eql? 200
+      error = "#{response.code} #{response.msg}"
+      raise APIError.new(response.body.present? ? "#{error} - #{response.body}" : error)
     end
 
-    def self.objects_call method, object_type, endpoint:, data: {}
-      metadata = describe object_type
-      data.update 'objectID' => metadata['schema_object_id']
+    parsed_response = response.parsed_response
 
-      request_with_authentication method, endpoint: endpoint, data: data
-    end
+    @configuration.debug_mode ? parsed_response.update(original_request: response.request) : nil
 
-    def self.objects_meta
-      @objects_meta_cache ||= request_with_authentication :get, endpoint: '/objects/meta'
-    end
+    Response.new **parsed_response.symbolize_keys
+  end
+
+  def self.objects_call method, object_type, endpoint:, data: {}
+    metadata = describe object_type
+    data.update 'objectID' => metadata['schema_object_id']
+
+    request_with_authentication method, endpoint: endpoint, data: data
+  end
+
+  def self.objects_meta
+    @objects_meta_cache ||= request_with_authentication :get, endpoint: '/objects/meta'
+  end
 end
diff --git a/lib/ontraport/configuration.rb b/lib/ontraport/configuration.rb
index bde6ab1..a37fe37 100644
--- a/lib/ontraport/configuration.rb
+++ b/lib/ontraport/configuration.rb
@@ -13,6 +13,9 @@ def self.configuration
   #   Ontraport.configure do |config|
   #     config.api_id = 'foo'
   #     config.api_key = 'bar'
+  #     if Rails.env.development?
+  #       config.debug_mode = true
+  #     end
   #   end
   #
   # @return [nil]
@@ -23,6 +26,9 @@ def self.configure
 
   # The Gem's configuration
   class Configuration
-    attr_accessor :api_id, :api_key
+    attr_accessor :api_id, :api_key, :debug_mode
+    def initialize
+      @debug_mode ||= false
+    end
   end
 end
\ No newline at end of file
diff --git a/lib/ontraport/response.rb b/lib/ontraport/response.rb
index 275270d..092fa3c 100644
--- a/lib/ontraport/response.rb
+++ b/lib/ontraport/response.rb
@@ -58,7 +58,12 @@ class Response
     #   Numeric object identifier for a particular object in the schema.
     #
     #   @return [String]
-    attr_reader :code, :data, :updates, :notifications, :account_id, :misc, :name, :fields, :schema_object_id
+    #
+    # @!attribute [r] original_request
+    #   Original HTTParty request only present when debug mode is enabled in config
+    #
+    #   @return [HTTParty::Request, nil] the original request for debugging
+    attr_reader :code, :data, :updates, :notifications, :account_id, :misc, :name, :fields, :schema_object_id, :original_request
 
     def initialize args
       args.each do |key,val|
diff --git a/lib/ontraport/version.rb b/lib/ontraport/version.rb
index 0c98a2f..78498ae 100644
--- a/lib/ontraport/version.rb
+++ b/lib/ontraport/version.rb
@@ -1,3 +1,3 @@
 module Ontraport
-  VERSION = '0.1.21'
+  VERSION = '0.1.3'
 end