{
  "manageEntity": {
    "action": "Save",
    "entityId": "956197979",
    "entityType": "Track",
    "nonce": "0xe456efa15d62b0323a10e36d50d3682feffb00c6b9ce738f12a7c9954a907fee",
    "signature": "0x346938db7087a5bb13307cdbba83a0319adeadb7b1b34e855c74e1ae70cb91957514b37709a3e8fe02cc3516ce9a7b396f5c50c57b51e7c537204b6f487715871c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}