OptionaldescriptionOptionalnameThe name of the file.
OptionalsizeThe filesize, if the integration provided it.
Optionalstory_The ID of the linked story.
Optionalthumbnail_The URL of the thumbnail, if the integration provided it.
OptionaltypeThe integration type of the file (e.g. google, dropbox, box).
Optionaluploader_The UUID of the member that uploaded the file.
OptionalurlThe URL of linked file.
The description of the file.