{
  "manageEntity": {
    "action": "Create",
    "entityId": "781913413",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":781913413,\"description\":\"\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Electronic\",\"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\":\"真实频率\",\"duration\":181,\"audio_upload_id\":\"c87baa08eee942eb3e1ec282fa6d77db\",\"track_cid\":\"baeaaaiqsebf5ciseyvztuxpzluvku6xjusdz2nhbxypzo6kch75garnmf6jwg\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsec6rkvjkrhf5tqosrozmh4hcous3zkn3vuqpf2gc4mgdoqyu4ra5w\",\"orig_filename\":\"6f9f8b78-fcb5-4888-a998-d4ef6109a183.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":122,\"is_custom_bpm\":false,\"musical_key\":\"G flat minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":370952704,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedhx54j26ejxioyy5tm67nmekmkoagc3skjlfd6gzr4pkcovkdfi4\"}}",
    "nonce": "0x73d73dd7880b24556859a855fa10754b03d23ecaf358fe53a7b1f97c212d4b51",
    "signature": "0xdd18e684473a25b048f3bffba4ea15b421439aa3c9f0e449f5b4b6692d7b889351ec7215071508a84aa7f4647ccf89945a17ca79934cd9d01651c289613d874b1b",
    "signer": "0x6313d065d34f89f9FC6BF460347CF8c76085A4a4",
    "userId": "370952704"
  }
}