{
  "manageEntity": {
    "action": "Save",
    "entityId": "773365",
    "entityType": "Track",
    "nonce": "0x1b4387f90e847af1db05302a4c4cb25142c1e73c6a571b53484155b998a5453c",
    "signature": "0x061dc47a29803e6c16c8e6a8e229287b56b3b23f8a5ed1b90c765cedd9f78b1426684808a696c34917532537a450e18783bc32dafb9f8a3796237f9c6417cd021b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}