{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742292605",
    "entityType": "Track",
    "nonce": "0xd3ff7784a1627d2c928e9ef26b08be60d48389bf75ebb81bbb6e58db90b5b412",
    "signature": "0xa3135b5915ead5729513c1b4b6fe58e94c23c607620d3bd175a919bbdd4bb0b00d7f3f3b2982c30cb25b41096a376f5fc30f1f690dcdbdb851d57160341ae6d41c",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}