{
  "manageEntity": {
    "action": "Save",
    "entityId": "443133713",
    "entityType": "Track",
    "nonce": "0xd24b272958954245b2667638f0532c8ba873b2880ff8c6ebfa18584ac3daf4e5",
    "signature": "0xd9b92b302e4bf760de986da94020af78133d0567ef67e3f4d17f29ae0996aecf044c9ee616cde6ae97c15352a1055b8497d6cc6a065711c3461aab575d786ec91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}