{
  "manageEntity": {
    "action": "Save",
    "entityId": "702753014",
    "entityType": "Track",
    "nonce": "0x2e747dde39ec929f682fa6a5cb99227f6c187c9eb95697e3d251a2a412153345",
    "signature": "0x87d5d469c451bf3ea3f3a16746b9fb3d3e155a2c933df4dbeca7311aca74bb6f5f291f0f1327d304a4f340059125f59828321303bbeaaf6a9716d31fc3cb506a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}