{
  "manageEntity": {
    "action": "Save",
    "entityId": "2144012100",
    "entityType": "Track",
    "nonce": "0x639fcc0ce77455eb8fb809b6da6d68427f2f47bc79a366f77bd0907910b56295",
    "signature": "0xe6d1ec96dda8655fad02af83c58b4acff747b7d290efc0a18e01c67470f3395523eff62bfb9f4738a84bf97085406779d3c7133411ba43d9b0774d5abf5eee2a1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}