awx external logging to graylog

Has anyone managed to get AWX to log externally to graylog (2.4 - will upgrade to 3.x soon)?

If so could you advise on which logging aggregator type to use in AWX as well as what listener type to use on graylog side?

I see messages flowing on the network however never see any messages in graylog (assumption is graylog does not understand them so just discards).

Any advise would be appreciated.