{
  "manageEntity": {
    "action": "Save",
    "entityId": "175123736",
    "entityType": "Track",
    "nonce": "0xbfbc54458211275f51e209a3fab986edab37650cc6e212d422d097dfcea5b175",
    "signature": "0xe84d9c955dd761b970300db0bd0ae71bac771cbe090f48021b17921bf6b8fc4f1d663fcf92fc04fed464d6dba749721192fb2d63fe43d63f80098a8d6c5514621b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}