#### example: revoke-service-request
```
{
    "resourceType": "Bundle",
    "type": "message",
    "timestamp": "2018-03-09T15:21:51.2112Z",
    "entry": [
        {
            "resource": {
                "resourceType": "MessageHeader",
                "eventCoding": {
                    "code": "revoke-service-request",
                    "display": "Revoke Service Request"
                },
                "focus": [
                    {
                        "identifier":{
                            "type": {
                                "text":"Caredove Inc."
                            },
                            "system":"https://caredove.com/fhir/NamingSystem/id-referral",
                            "value":"94jd7597-d19a-41c2-bb9a-3077s53bd9ae"
                        },
                        "reference": "ServiceRequest/274659394"
                    }
                ]
            },
            "request": {
                "method": "POST",
                "url": "MessageHeader"
            }
        }
    ]
}