RESTful search operation

{
  "resourceType": "AuditEvent",
  "id": "example-search",
  "text": {
    "status": "extensions",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: AuditEvent</b><a name=\"example-search\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource AuditEvent &quot;example-search&quot; </p></div><p><b>category</b>: Restful Operation <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/3.1.0/CodeSystem-audit-event-type.html\">Audit Event ID</a>#rest)</span></p><p><b>code</b>: search <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"codesystem-restful-interaction.html\">FHIR Restful Interactions</a>#search)</span></p><p><b>action</b>: E</p><p><b>recorded</b>: 23/08/2015 9:42:24 AM</p><h3>Outcomes</h3><table class=\"grid\"><tr><td>-</td><td><b>Code</b></td></tr><tr><td>*</td><td>Success (Details: http://terminology.hl7.org/CodeSystem/audit-event-outcome code success = 'Success', stated as 'Success')</td></tr></table><blockquote><p><b>agent</b></p><p><b>type</b>: human user <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/3.1.0/CodeSystem-extra-security-role-type.html\">SecurityRoleType</a>#humanuser)</span></p><p><b>who</b>: <span>: Grahame Grieve</span></p><p><b>requestor</b>: true</p></blockquote><blockquote><p><b>agent</b></p><p><b>AlternativeUserID</b>: process ID: 6580</p><p><b>type</b>: Source Role ID <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://dicom.nema.org/resources/ontology/DCM\">DICOM</a>#110153)</span></p><p><b>who</b>: <span/></p><p><b>requestor</b>: false</p><p><b>network</b>: Workstation1.ehr.familyclinic.com</p></blockquote><h3>Sources</h3><table class=\"grid\"><tr><td>-</td><td><b>Observer</b></td><td><b>Type</b></td></tr><tr><td>*</td><td><span>: hl7connect.healthintersections.com.au</span></td><td>Web Server <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/3.1.0/CodeSystem-security-source-type.html\">Audit Event Source Type</a>#3)</span></td></tr></table><h3>Entities</h3><table class=\"grid\"><tr><td>-</td><td><b>Role</b></td><td><b>Query</b></td></tr><tr><td>*</td><td><span title=\"  HTTP GET encoded in base64Binary  &amp;#10;  orignal example encoded here is  &amp;#10;  &quot;http://fhir-dev.healthintersections.com.au/open/Encounter?participant=13&quot;  \">Query <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"codesystem-object-role.html\">AuditEventEntityRole</a>#24)</span></span></td><td>aHR0cDovL2ZoaXItZGV2LmhlYWx0aGludGVyc2VjdGlvbnMuY29tLmF1L29wZW4vRW5jb3VudGVyP3BhcnRpY2lwYW50PTEz</td></tr></table></div>"
  },
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/audit-event-type",
          "code": "rest",
          "display": "Restful Operation"
        }
      ]
    }
  ],
  "code": {
    "coding": [
      {
        "system": "http://hl7.org/fhir/restful-interaction",
        "code": "search",
        "display": "search"
      }
    ]
  },
  "action": "E",
  "recorded": "2015-08-22T23:42:24Z",
  "outcome": {
    "code": {
      "system": "http://terminology.hl7.org/CodeSystem/audit-event-outcome",
      "code": "success",
      "display": "Success"
    }
  },
  "agent": [
    {
      "type": {
        "coding": [
          {
            "system": "http://terminology.hl7.org/CodeSystem/extra-security-role-type",
            "code": "humanuser",
            "display": "human user"
          }
        ]
      },
      "who": {
        "identifier": {
          "value": "95"
        },
        "display": "Grahame Grieve"
      },
      "requestor": true
    },
    {
      "extension": [
        {
          "url": "http://hl7.org/fhir/StructureDefinition/auditevent-AlternativeUserID",
          "valueIdentifier": {
            "type": {
              "text": "process ID"
            },
            "value": "6580"
          }
        }
      ],
      "type": {
        "coding": [
          {
            "system": "http://dicom.nema.org/resources/ontology/DCM",
            "code": "110153",
            "display": "Source Role ID"
          }
        ]
      },
      "who": {
        "identifier": {
          "system": "urn:oid:2.16.840.1.113883.4.2",
          "value": "2.16.840.1.113883.4.2"
        }
      },
      "requestor": false,
      "networkString": "Workstation1.ehr.familyclinic.com"
    }
  ],
  "source": {
    "observer": {
      "display": "hl7connect.healthintersections.com.au"
    },
    "type": [
      {
        "coding": [
          {
            "system": "http://terminology.hl7.org/CodeSystem/security-source-type",
            "code": "3",
            "display": "Web Server"
          }
        ]
      }
    ]
  },
  "entity": [
    {
      "role": {
        "coding": [
          {
            "system": "http://terminology.hl7.org/CodeSystem/object-role",
            "code": "24",
            "display": "Query"
          }
        ]
      },
      "query": "aHR0cDovL2ZoaXItZGV2LmhlYWx0aGludGVyc2VjdGlvbnMuY29tLmF1L29wZW4vRW5jb3VudGVyP3BhcnRpY2lwYW50PTEz"
    }
  ]
}