{
  "manageEntity": {
    "action": "Save",
    "entityId": "159633",
    "entityType": "Track",
    "nonce": "0x9365c5388acdea9efa0a3503f54d969a9ba7ff914e24b9022c8ea779cb45f7ad",
    "signature": "0xd6d8df9718252f97e3d96662c115c209ee6c089ff4d69d9a7fb69b62fb7c7d2b4b2c53ec1d3823013f98c112d37b9c551d8871abccdc869adae416731e042e021c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}