Use match when you have metadata and need one canonical OpenMusicMetadata resource.

GET /match/song?name=blue&artist=example
GET /match/album?name=blue&artist=example
GET /match/artist?name=example

Song matching can use album name as extra context.

GET /match/song?name=blue&album=example&artist=artist

Album matching can use artist name as extra context.

GET /match/album?name=example&artist=artist

Artist matching only uses artist name.

GET /match/artist?name=artist

The response is Single<Song | Album | Artist>. The returned type matches the requested type.