Does CN4 with the following structure exist?
All kinds of weird molecules exist in space. The molecule is formally known as bis(diazo)methane according to chemdraw. By looking at the structure it contains a Diazomethane moiety. Resonance would also take place to introduce the charges at both nitrogen atoms.  The structure doesn't seem to exist on any chemical database nor any official papers have been released relating to the exact structure. It may exist considering the fact that all atoms have a total of 8 surrounding electrons.
I hope this provides some clarity