{"composer": null, "title": null, "midi_filename": "Chopin, Fr\u00e9d\u00e9ric, Polonaise in B-flat minor, B.13, YmtsUp8HFZg.mid", "record_id": null, "user": null, "start": 1792, "finish": 1920, "start_time": 201.34895833333331}