What about Nxb7? Will that work? We grab the pawn but we are not improving our position. 
f3: 1 vote (GoldTiger69)
Nxb7: 1 vote (Morecoin)
f3: 1 vote (GoldTiger69)
Nxb7: 1 vote (Morecoin)
I like the idea of f3 (to free our rook) but am scared of 32.f3 Nc3+ 33. Ka1 Ne2
I love extra pawns but our rook and King are still stuck after 32.Nxb7 Rc8
How about 32.Nb5 with the goal of capturing a3 instead of b7? At least our king would not feel as trapped in the corner afterwards.
The key to this endgame is piece activity. Good luck to both teams.
This seems more like general advice than advice for this move, but it is still something to think about.
f3: 1 vote (GoldTiger69)
Nxb7: 1 vote (Morecoin)
Nb5: 1 vote (boolberry)