Smoking whole beef blade steak
This cut can be smoked similarly to a chuck roast or pot roast, which might help you search for recipes on your own.

As a baseline, you could try smoking it uncovered until it's around 150-170F, then foil wrap it and bring it up to 200F. This, along with letting it rest after you take it out, will ensure it doesn't dry out. This will take around 4-6 hours minimum.