{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580376121",
    "entityType": "Track",
    "nonce": "0xf320f58e3b0cb5f5e40f5d8ec9c197475fcf0f8f84534d9be3d5ac470dc112c8",
    "signature": "0x9dc263f303febc263a7e6ebec7eff026d0e9a6776cf390fce10126381a4d608839544b8a4b9e09cb56f469b026e59064277292a39c58a30b5e34d0e6104477921b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}