{
  "manageEntity": {
    "action": "Create",
    "entityId": "251891256",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":251891256,\"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,\"mood\":\"Cool\",\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"煉化\",\"duration\":112,\"audio_upload_id\":\"8b9544f1279ec2652365b7e2d624d845\",\"track_cid\":\"baeaaaiqsed7v6c36556rqrrkmryvc27ueqy467vr5qxmfwjni66i6jx37vfcy\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsec6ebapr62sm5jrntg7k53zoxsissvco5vsj4uahddi3p3djewhcc\",\"orig_filename\":\"煉化.wav\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":91,\"is_custom_bpm\":false,\"musical_key\":\"F minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":947140631,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsectkhypw7ezlz2ewcnz5evl6hlpq6lcurpusbli6hxzuhaxavsz6u\"}}",
    "nonce": "0xdbc63c232cc19e1e1a93e7b7e8386288e23fbbecca1d8d06934272417fb26404",
    "signature": "0xde1d25ee28b592b726870651b1197c318fd255407613f6496057b8b54b91965a0921e06c3d5e97872e2ddb5fa7b172b0b74ff0069a513509a5f0c4b7d33d65111c",
    "signer": "0xA169dE4d8c253bf06970019E3835E60a57cBeb25",
    "userId": "947140631"
  }
}