Issue with `catalog.json` structure when using `download assets` command

[cappuccinoako]

When using ./linklike download assets <catalog_path> <download_directory> with the provided catalog.json
With the current catalog.json structure

[
    {},
    {},
    ...,
    {}
]

It will cause: Error: invalid type: map, expected a sequence at line 2 column 2

I change catalog.json structure to

[
    [
        {},
        {},
        {},
        ...,
        {}
    ]
]

and the ./linklike download assets <catalog_path> <download_directory> command works fine