This is a quickly made up track in A, it will give you an idea.
It has the midi file with it so you can edit it, give it some more variations and save it to more keys. Look in the Bar Settings > UserTrack Development Settings.
Anyway play around with it as it might give you some ideas of what you can do.
There is suppose to be a Don't Transpose UserTracks setting they are adding to BB/RB so it don't overtranspose the tracks anymore.

Bass Guitar Reggae Sheriff Ev16 090 A