{
  "manageEntity": {
    "action": "Save",
    "entityId": "775465983",
    "entityType": "Track",
    "nonce": "0x201dfbad05bfa35485c732315632acb0c02aeacf26a9469b9c8e03e659ac3746",
    "signature": "0x63d1c4de0a3bf601aa23523e40aac717c811d69c7be4ceb5de9a023b026ce4e6672ac483192caf8ed626befe1438d50405c6f0b182bb1adc40413ad5d062ccb21b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}