PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($80.05)
MP ($43.30)
CO ($17.40)
Button ($55.10)
Hero ($50.45)
BB ($48.80)

Preflop: Hero is SB with J, J.
UTG calls $0.50, MP calls $0.50, CO calls $0.50, Button calls $0.50, Hero raises to $3.5, 1 fold, UTG calls $3, MP folds, CO folds, Button folds.

Flop: ($9) 5, J, 4 (2 players)
Hero bets $7.5, UTG calls $7.50.

Turn: ($24) 2 (2 players)
Hero bets $22, UTG calls $22.

River: ($68) 3 (2 players)
Hero ???

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No strong reads on the Villian.

What's your play here on the river?