The service Restream.io allows split original stream to other services. See how to stream to Restream.io by JustBroadcaster.
Step 1
Open JustBroadcater and press On Air and select RTMP Mode
It opens browser page for streaming. You need fill two fields.
Step 2
Log in to Restream.io, found RTMP URL field and Stream Key and copy them to JustBroadcaster and press START:
Finish
After START you can see your stream in Restream.io dashboard: