code: private void parseManagementEvent(CloudTrailEventData eventData) throws IOException {
          jsonParser.nextToken();
          Boolean managementEvent = null;
          if (jsonParser.getCurrentToken() != JsonToken.VALUE_NULL) {
              managementEvent = jsonParser.getBooleanValue();
          }
          eventData.add(CloudTrailEventField.managementEvent.name(), managementEvent);
      }
docs: Parses the event managementEvent attribute.
  @param eventData the interesting {@link CloudTrailEventData}
  @throws IOException