{

"resourceType": "Communication",
"id": "example",
"text": {
  "status": "generated",
  "div": "<div>Patient has very high serum potassium</div>"
},
"identifier": [
  {
    "fhir_comments": [
      "  insert contents here  "
    ],
    "type": {
      "text": "Paging System"
    },
    "system": "urn:oid:1.3.4.5.6.7",
    "value": "2345678901"
  }
],
"category": {
  "coding": [
    {
      "system": "http://acme.org/messagetypes",
      "code": "Alert"
    }
  ],
  "text": "Alert"
},
"sender": {
  "reference": "Device/f001"
},
"recipient": [
  {
    "reference": "Practitioner/21"
  }
],
"payload": [
  {
    "contentString": "Patient 1 has a very high serum potassium value (7.2 mmol/L on 2014-Dec-12 at 5:55 pm)"
  },
  {
    "contentReference": {
      "fhir_comments": [
        " Reference to the lab result  "
      ],
      "reference": "Observation/643666aa12f"
    }
  }
],
"status": "completed",
"sent": "2014-12-12T18:01:10-08:00",
"subject": {
  "reference": "Patient/1"
}

}