Place the hard-boiled eggs in a bowl or storage container and pour the pickling brine from the beet jars over the eggs, making sure the eggs are submerged. (You may need to place a weight or a plate on top.) Allow the eggs to sit for 45 minutes to 1 hour in the brine, but no longer or they'll start to get rubbery.
Slice the eggs in half lengthwise. Gently remove the yolks by pressing your thumb against the back of each yolk to pop it out of the white. Add the yolks to the bowl with the filling and mash with a fork until smooth. Season with salt.
Spoon the filling into the egg whites, or use a re-sealable plastic bag to pipe it in. Sprinkle with paprika and dill before serving.