{
  "manageEntity": {
    "action": "Save",
    "entityId": "409593153",
    "entityType": "Track",
    "nonce": "0x0de1d4e97992df16fea8abd53c77fe4b335f695a5403b164017bea0f80a6fcef",
    "signature": "0xb7e9d50e2ff420d2ab89d29a85b9a6148368076e2816f02d44f35d0228d81e9212c9260c253363ac6cd13a11f6c9cb68496cf211b8d4450428f47c7e873241fe1b",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}