{
  "manageEntity": {
    "action": "Save",
    "entityId": "541403",
    "entityType": "Track",
    "nonce": "0x7ae8833d9a1211f6acc2a5a9b61c025cf1339640fb29b8329397e00cc1a805a1",
    "signature": "0xb5194d36282d62260ce12400868046fe51b54d24d41fe7277fac657c89beb552253628ae55e0e56bb2b3c050291ab343f0f430b27f390175b54416a4c1474b611c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}