The biggest maniac in history is sitting to your left

[DesertCat]

You sit down with $50 at a 6 Max 50 PL table on Party. First hand, player to your left ($170) pots it preflop, pots it on the flop, on the turn and on the river, opponent folds. Second hand same player pots it preflop, is called, and pots the flop. Opponent folds.

Third hand. You get QhJs in the big blind. Same maniac pots it UTG. All fold to you and you call. Pot $5. Flop Jc3d5d. You check, maniac bets $5. You call. Pot $15.

Turn is third diamond, 9d. You check. Maniac bets $10. You call. Pot $35.

River is ugly. The fourth diamond is the King. You check. Maniac bets $20. You have only $32 left. You can't fold even the deuce of diamonds with a reraise.

What do you do, hotshot? What do you do?