Not sure for this exact mesh because I don’t have access to it but usually for any static mesh you can right click on it in the content browser and ask it to make a blueprint actor out of the mesh and it should auto create the actor. You could then go an change the parent class to a pawn. Alternatively, you could just create a pawn blueprint and add a static mesh component and then add the static mesh you got from the marketplace. If it is a mesh it should add just fine.