{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649218613",
    "entityType": "Track",
    "nonce": "0xf9d4eb5fdb888f53b1260b8f4ba1480bb6379f75f10f7536e593c800b029b06b",
    "signature": "0x3006415b12cbfa88aded2b39c099df9f575a01fad9ada2af4cb11d080fd0c3463ba0b434d5016a8e6d2523a71e47b9cd248e6872f87af52c55eb04dd797b6bec1b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}