Where are you getting the lone pairs on the nitrogen from?
From what it seems like, the structure is O-N-N-O with a triple bond between the nitrogen. Because oxygen is more electronegative than nitrogen, the oxygen atoms will have a slight negative charge and the nitrogens will have a slight positive charge.
However, because they are opposite of each other, they should cancel each other out leading to a non-polar molecule. I may be wrong but that's my best bet.
If you calculate the formal charge, both of the oxygens will have a formal charge of -1, while the nitrogens will have a formal charge of +1, which makes sense due to electronegativity. Also, the overall charge is 0.
Hope that helps.