{
  "resourceType" : "Communication",
  "identifier" : [" Identifier "], 
  "category" : " CodeableConcept ", 
  "sender" : " Reference(Device|Organization|Patient|Practitioner|RelatedPerson) ",
  "recipient" : [" Reference(Device|Organization|Patient|Practitioner|RelatedPerson|Group) "], 
  "payload" : [{ 
    "contentString" : "<string>",
    "contentAttachment" : " Attachment ",
    "contentReference" : " Reference(Any) "
  }],
  "medium" : [" CodeableConcept "], 
  "status" : "<code>", 
  "encounter" : " Reference(Encounter) ", 
  "sent" : "<dateTime>", 
  "received" : "<dateTime>", 
  "reason" : [" CodeableConcept "], 
  "subject" : " Reference(Patient) ", 
  "requestDetail" : " Reference(CommunicationRequest) " 
}