{
  "manageEntity": {
    "action": "Save",
    "entityId": "218175223",
    "entityType": "Track",
    "nonce": "0xa1633a287ebe7308d9c32dba966d9dcd5301fa5ab2c3527e3689719387da09c7",
    "signature": "0x37670a41271871607b1a50fc6865df5918dbf70f1094a5a1132de0d116ed48d6601976cb7721cca3c4401683fc21087edab5977f957e64565ad5b8dde8e232811b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}