{
  "manageEntity": {
    "action": "Save",
    "entityId": "54740",
    "entityType": "Track",
    "nonce": "0xe679703d3cca9d372980a258f960efb30a51ea2ab3615d770e2161d13aa123ae",
    "signature": "0xea86cd702e34e6eb7b7cece4f91b3f7c80d0723d0732c11df5f44bcb0500d750344b480616cc347f462ef2ecfcfc528014232c6440aa1b632f0bf37577fb22b71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}