{
  "manageEntity": {
    "action": "Save",
    "entityId": "864406066",
    "entityType": "Track",
    "nonce": "0xe030ce50f444b01d7864f620a4915b970e34d57b580648ad0c4303e8dc648eba",
    "signature": "0x7cd15b811dd089fda9e8a78e219bb0a0c5b1ef395460beb693f952e4087aebc77f8239bb56ed6ff7eb4fc72d839694a8ef15bcab45245504709c959eead5c5761b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}