Can you show me how retrieving document groups API call should look like in JSON?

The call returns back all document groups the user owns. If the group does not have an attached group invite, the invite fields will be null. Each group includes an array of documents and their thumbnails within the group. Thumbnail calls will need the query parameter &access_token=ACCESS_TOKEN to be used.

The call is paginated by last_updated, so offset and limit query parameters are required:

1. Limit must be greater than 0 but less than or equal to 50.
2. Offset must be 0 or greater.