{
  "manageEntity": {
    "action": "Create",
    "entityId": "717082450",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":717082450,\"description\":\"\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"R\u0026B/Soul\",\"isrc\":\"\",\"is_unlisted\":false,\"iswc\":\"\",\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"短編小説案内\",\"duration\":102,\"audio_upload_id\":\"e3ad1dd5ccbe1769cc3afdf9a319f2c1\",\"track_cid\":\"baeaaaiqsed3hcb2m44blzhenfgdkbyggup7dgqpgyaazcsc4gin7ixhhn5v22\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsedlcamqqiwas5zhryym3qsdtp5eqeq5tv42pkrbdz6ue5lz3ix5ao\",\"orig_filename\":\"短編小説案内.wav\",\"is_downloadable\":false,\"is_original_available\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":124,\"is_custom_bpm\":false,\"musical_key\":\"A flat minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":194152,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedhg5fwtnpp76wamew6xjgduma7yodh3nt6gb67didwucjarponfw\"}}",
    "nonce": "0x0e20bee89fd30ddbb3c6dee516dea5d6932cca3bf9b49ac7efc9131786a58e0c",
    "signature": "0x70d52ca2b82c25db3d2403f250c3f96b2608c732159b909c501448005c3bd20317e43b89986dba47546fbde8ae6fdf09bf92dad0cf351e6363f904dc854a015a1c",
    "signer": "0x930927a12FB33EBF8aedF2001C7f96c367DCB916",
    "userId": "194152"
  }
}