OptionalartistMaps to artist_id — third-party IDs for this participant.
OptionalinstrumentMaps to instrument. Generally used with the Performer role.
Maps to name. Required.
OptionalprimaryMaps to primary. Omitted entirely when undefined; false is emitted.
Maps to role, e.g. Main Artist. Required.
OptionalroleMaps to role_type — an optional vendor sub-role, e.g. Executive Producer.
participant_type— anyone involved in a recording or release.