{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322840173",
    "entityType": "Track",
    "nonce": "0xa3e6f2ad1ad2941ceb873d4f74a1c1dc1c157e493a30b43ec87c5afec331d521",
    "signature": "0x19eacd5df9ddc2bc0e126a5adf171e930bff6a273db88b8708db1c9ff85027ed2658034329d5663f0ffe2068b9445d00407f8fadd342cdde90696d230ca8eff81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}