{
  "manageEntity": {
    "action": "Save",
    "entityId": "806883090",
    "entityType": "Track",
    "nonce": "0x67a7581dde17f904eaa59c05debdcb787357235897ff485541a19852617c0ea3",
    "signature": "0x978181949ad77a8767425be84d36bd9b36d1ad268ae0b055caa4b02db345b7363b02ff2a26fac6ea0fc756cef3593d274b073c42e2ef25178b1f048aa3c073021b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}