{
  "manageEntity": {
    "action": "Save",
    "entityId": "859779598",
    "entityType": "Track",
    "nonce": "0x596508983aa7a15822c4adfa05e37f939aa9f318d0689ed9fea745b87f6d95ed",
    "signature": "0x0a63f42e06e72f28fab44913d652c3acb513b0f393de705663b68cbc7adf26c3656fd556a407e1bdcdc05893b12a180d079ef7ea7823f61ed30c1a8e78dad1da1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}