{
  "manageEntity": {
    "action": "Create",
    "entityId": "448291419",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":448291419,\"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,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"CM_302 - 飛向宇宙  Полёт в космос  Fly to the Universe  [русский]\",\"duration\":297,\"audio_upload_id\":\"9c3eb4b8656314dba4327c1365bae47a\",\"track_cid\":\"baeaaaiqsedsop2xydxv2ysl36ydb3ibdyj3e5ftpdfz5ifnl4nbi2hhhdsmm6\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsebjwcqw3hms3pjnyykw3ldxgkbkcnoe4hi6dkqq2figm7m4y477m4\",\"orig_filename\":\"CM_302 - 飛向宇宙  Полёт в космос  Fly to the Universe  [русский].wav\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":121,\"is_custom_bpm\":false,\"musical_key\":\"F major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":610888861,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsecjkhlinnyt6lunncl763zrtjkg3k545ipf44semiyremtauvzg2k\"}}",
    "nonce": "0xbabe0ed46b8489b189526bccf6ba7ff311505e6f64766db264dc3d324b059c57",
    "signature": "0x1ba23e97cbc59054b9978aff337d3a56d5f1a1f742ea1d4b4049c9d022be70b21fde14ba4616438b8a5a08236bec05266d82c96de69531929df48df93c5b1e641b",
    "signer": "0xf5BfE006B204417a4a7D6B64C2336EEE309eCc17",
    "userId": "610888861"
  }
}