{
  "manageEntity": {
    "action": "Save",
    "entityId": "43993009",
    "entityType": "Track",
    "nonce": "0x88f9bffa0e3fd90577bc8fb3d3c2eda6ed51dadf65494d1a4f8041e49925ae71",
    "signature": "0xd6dec0d5077a0e26346aaf6eff9d150672bd249fda8b3701d97edf2753bef28a337fcc70301555ca5f4e28236a676c97ca185e96727cc3410bf04332085e98391c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}