You didn't say how many people had to act after you and what size UTG's stack was in relation to the rest of the table (but if you were 3rd with 45k than he looks like the short stack)
I call.
If UTG takes the blinds he will only have 11k left so he could be pushing with wide range of hands. The fact he has been playing tight wouldn't bother me that much as he is more likely to be desperate in this spot. You are probably in a coin flip situation so I suppose it depends on whether you want to try to cash or win. Even if you lose you will still have around 30k left which still leaves you in with a chance.
I was acting after the UTG he was 2nd shortest the BB was short stack. But BB I think is always going to pass if I or any other player decide to call the all in. The BB has already made noises about doing a saver for 4th so I know he is happy to take a saver and let someone else risk taking on the all in.
As for the players who where acting behind me one player was mates with the all in and there where occasions I thought they where actually avoiding taking each other on. Not sure if that was just my perception but the player acting after me was very erratic.
The SB was CL and he generally tried to stay out my way on many occasions.
I actually called and straightaway I thought it was the wrong move because the guy acting after me dwelled up for a while and eventually passed and SB and BB insta passed after that. I turned over the 8's and all in showed 5's. Guy acting after me passed AK.
8's held up and I ened up going on to win the tourney.