code: public static JsonNode buildResponse(int status, String message, Object data) {
          return SerializationUtils.toJson(MapUtils.removeNulls(MapUtils.createMap(FIELD_STATUS,
                  status, FIELD_MESSAGE, message, FIELD_DATA, data)));
      }
docs: Build Json-RPC's response in JSON format.
  
  <p>
  Json-RPC response as the following format:
  </p>
  
  <pre>
  {
  "status" : (int) response status/error code,
  "message": (string) response message,
  "data"   : (object) response data
  }
  </pre>
  
  @param status
  @param message
  @param data
  @return