An example of a response to a request for additional information

{
  "resourceType" : "Communication",
  "id" : "fm-solicited",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">Attachment in response to a Request</div>"
  },
  "contained" : [{
    "resourceType" : "Organization",
    "id" : "provider",
    "identifier" : [{
      "system" : "http://www.jurisdiction.com/provideroffices",
      "value" : "3456"
    }]
  },
  {
    "resourceType" : "Organization",
    "id" : "payor",
    "identifier" : [{
      "system" : "http://www.jurisdiction.com/insurer",
      "value" : "123456"
    }]
  },
  {
    "resourceType" : "CommunicationRequest",
    "id" : "request",
    "identifier" : [{
      "system" : "http://www.jurisdiction.com/insurer/123456",
      "value" : "ABC123"
    }],
    "status" : "completed",
    "intent" : "proposal",
    "subject" : {
      "reference" : "Patient/1"
    }
  }],
  "identifier" : [{
    "system" : "http://www.providerco.com/communication",
    "value" : "12345"
  }],
  "basedOn" : [{
    "reference" : "#request"
  }],
  "status" : "completed",
  "category" : [{
    "coding" : [{
      "system" : "http://acme.org/messagetypes",
      "code" : "SolicitedAttachment"
    }]
  }],
  "subject" : {
    "reference" : "Patient/1"
  },
  "sent" : "2016-06-12T18:01:10-08:00",
  "recipient" : [{
    "reference" : "#payor"
  }],
  "sender" : {
    "reference" : "#provider"
  },
  "payload" : [{
    "contentAttachment" : {
      "contentType" : "application/pdf",
      "data" : "SGVsbG8=",
      "title" : "accident notes 20100201.pdf",
      "creation" : "2010-02-01T11:50:23-05:00"
    }
  },
  {
    "contentAttachment" : {
      "contentType" : "application/pdf",
      "url" : "http://happyvalley.com/docs/AB12345",
      "size" : "104274",
      "hash" : "SGVsbG8gdGhlcmU=",
      "creation" : "2010-02-01T10:57:34+01:00"
    }
  }]
}