{
  "manageEntity": {
    "action": "Save",
    "entityId": "543027899",
    "entityType": "Track",
    "nonce": "1785588775180448829",
    "signature": "0x77108b0f3ab6fe12f9c047faf51ee7853dedaf94cbf4f48ed9eb5f242cc4fc751073b0440d1cd1d1af77aacf83aa5d3dd6284ac9fabd1b408b60e7a336113d301c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}