{"copyright_id":"0x79a3281c7865301607f30280c39f5f5aaa89f31da881a6a32a548beba484d10a","isrc":"HKI192044805","name":"Piano Sonata No. 21 in C Major, Op. 53 \"Waldstein\": I. Allegro con brio","registered_at":"2026-07-31T10:36:21Z","spotify_id":"7ugCxp6ZVu8HhstSTrGI5I","type":"track"}