{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721090487",
    "entityType": "Track",
    "nonce": "0x793df742f94d14197a033e74c8d3c2e376740669b7d2673517e4c717bb3a11f7",
    "signature": "0x32460e1dc21245d7d9de5423ff8865525ce8e24d58b8fe5e19abef785217a191741a01e632892b7160e914962f74d6884905a4b269e5692c0098cd3c6d5c8e361c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}