{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463525519",
    "entityType": "Track",
    "nonce": "0xb3b324d5a28c9cfd1577a2c61661e893775ea52058014f51b8d6f18548c78d19",
    "signature": "0xa1437d79d85091c8f34b27eb2472859cc85e914043efc12e2420e967ece2658a52aa911ac2b67a9237f7a38de84eed787de67d1569dfde252b59756d270eb8451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}