<RaiseFault name='RF-Unknown-Request'>
  <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
  <FaultResponse>
    <Set>
      <Payload contentType='application/json'>{
  "error" : "that request was unknown",
  "message" : "try a different request."
}
</Payload>
      <StatusCode>404</StatusCode>
    </Set>
  </FaultResponse>
</RaiseFault>
