{
  "manageEntity": {
    "action": "Create",
    "entityId": "941997448",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":941997448,\"description\":\"\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Classical\",\"isrc\":\"\",\"is_unlisted\":false,\"iswc\":\"\",\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"CM_316 - 中華五四  中华五四  China's May Fourth  [中文]\",\"duration\":304,\"audio_upload_id\":\"65453169bd2d0eb4654642783200f294\",\"track_cid\":\"baeaaaiqsecgi5tx5wxp5wmcbapmvzy7emog6ml54vholaak62suw3bnbacmts\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsebmaicnuexremyduhj4d7zf5mr7dgqmsruxiyohhga256ooicdtwm\",\"orig_filename\":\"CM_316 - 中華五四  中华五四  China's May Fourth  [中文].wav\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":149,\"is_custom_bpm\":false,\"musical_key\":\"E flat major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":610888861,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsect6ilk5dqe55j5qswwi3zwmjrelotrkl4gb2jyw3kk3nysc2m56e\"}}",
    "nonce": "0xdb11e4b59b7b00105535b12e090e8ad270072d7751b33970769ab2368b550a27",
    "signature": "0xe1ef00e51da84af632100000549adfa514489a4ad3ecdcbc00fd3b7b7ee76aec465eb53fd11510644f5cbd58b13e69dc3abf782045ba5bcf0384ba5264b9e6531c",
    "signer": "0xf5BfE006B204417a4a7D6B64C2336EEE309eCc17",
    "userId": "610888861"
  }
}