Can I add subfields to workout -> workout_step

[dachinat]

I see that there are subfields to workout_step like duration_step and duration_power and etc. Could you please hint how can I add it to protocol?

More precisely, I am in need to add something like

Duration = 3000
PowerHigh = 0.85
PowerLow = 0.65
Pace = 2
Units = 1
Message = ...

To workout step.

Or could you please add a full example for Workout type? Thanks.