I am not sure if it is compatible but I cannot find any information about it.
Wowza Streaming Engine can accept audio from both SHOUTcast and Icecast servers. If Traktor 2 supports either of those then you should be able to have Wowza Streaming Engine connect to Traktor 2 and the deliver your audio only stream.
https://www.wowza.com/docs/how-to-re-stream-audio-from-shoutcast-icecast
For additional information on what Wowza Streaming Engine supports for live streaming inputs, please reference the information in the following page.
https://www.wowza.com/products/streaming-engine/specifications