Help Identifying Italian track frame
This could be pretty much anything, you might want to find a specialist in lugworks. Many Italian frame makers had very unique lugging to determine their bikes from the rest. I used to know a few by heart back in the days when I was restoring old racers for Single Speed Co but I'm afraid that skill has fallen back now. Having unique lugs was especially important on older bikes. 
I can't see on the photos what is happening between rear dropouts, it could be an old track frame but some older bikes never had the horizontal dropouts so it could just be an old frame designed as a single speed bike. It definitely looks older than 80's and even 70's are still questionable. 

How is the weight on this?