{
  "manageEntity": {
    "action": "Save",
    "entityId": "255010",
    "entityType": "Track",
    "nonce": "0xd1f7fa593500d2200a8a55cb911d7ded9cf76935ddbc6379575a573a263bce3f",
    "signature": "0x845ad0685da1392247b7061bee5ea58ccbe538d9f1b9fea01f8543af172061ea14bb9d9e729e8fe1d31c605af84d3ee05bd0705e162300fb8858bff4c92e6dc61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}