{
  "manageEntity": {
    "action": "Save",
    "entityId": "11789",
    "entityType": "Track",
    "nonce": "0x1aa1a551253ee331f4e453918692ebcf06a5d697f48aa223a4bb092d2767d394",
    "signature": "0x73ce6e2805bae5ffa19e15ff8346da919cad19be82bd3b3b87c4aaa6ec96c8790456518b394dc518dbd5be0b83e8cdf9be9014f071bf5c49c699613eed0a57d51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}