{
  "manageEntity": {
    "action": "Save",
    "entityId": "323480",
    "entityType": "Track",
    "nonce": "0xc3caf0414b793a8fec8a6ef97e9b7fa105f3a7df5603b78d13779148524bb7e7",
    "signature": "0x8db06cb108795cee07d4bfc98c62ded3407c203cc817c90b36ec1b5d0fa1d5560e87e17672b93b50e7b650928901f8f7a95acb05ee1c69d96ef255b78f78b10a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}