mbid (Optional) : The musicbrainz id for the track track (Required (unless mbid)] : The track name artist (Required (unless mbid)] : The artist name username (Optional) : The username for the context of the request. If supplied, the user's playcount for this track and whether they have loved the track is included in the response. autocorrect[0|1] (Optional) : Transform misspelled artist and track names into correct artist and track names, returning the correct version instead. The corrected artist and track name will be returned in the response. api_key (Required) : A Last.fm API key.