This had a promising start, but I just couldn't get it. I collected the shovel, and that was about as far as I progressed. I thought maybe I was supposed to bury the body to free the path to continue on, but I couldn't figure out how to do that.
I figured it was blocking the way, but I couldn't figure out how to get the body down. I tried just grabbing it directly, and breaking the rope with a gunshot or the shovel itself. Eventually I just gave up.
The rope isn't a separate interaction from the body itself. You had the right idea, just you were more clever than I planned for. You should be able to use one of the items on the corpse itself.