{
  "manageEntity": {
    "action": "Save",
    "entityId": "984891490",
    "entityType": "Track",
    "nonce": "0xb0dc71e5ab663520a2426c364e33581277a44e8bee4c58fe14119156af5fbe1e",
    "signature": "0xe8406b175c2a71d0490cd56772c079047c6121c022fa5d66f3fe6db63935a0003972bd13e107c6146247ff8094539bd46fa8cb1133cade30868582e2acafb8c01c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}