OptionalattrMaps to attr.
Maps to file_name — filename with extension, no folder structure. Required.
OptionalformatMaps to format, generally the file extension.
Optionalmd5Maps to md5_checksum. Optional as of schema v3.4.
OptionalmimeMaps to mime_type, e.g. audio/flac.
OptionalnameMaps to name.
OptionalnotesMaps to notes.
OptionalsubtypeMaps to sub_type — the AudioSalad media type, e.g. wav, Front.
Maps to type, e.g. audio, image, asset. Required.
asset_type— an audio recording, artwork image, or arbitrary file.