{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087018412",
    "entityType": "Track",
    "nonce": "0x22ef8d4fa00b2e53d3245e19a6c5654d90b8bf2ed1df7281c3c2bb07a07ea72d",
    "signature": "0x88a40aa103aaa5c5116a9dcfc07544874ca1884c8d36dcf393a98a4c69bda8ab374068b71949cd19de54cf4733bb05a736c38039bf830f7bca79ac267ca3e78d1b",
    "signer": "0xFceED8fCcceFA8b13b74d5d561AeB7DcBE6Fe6E7",
    "userId": "492488582"
  }
}