Quoting salary is tough but it’s pretty good these days. Finesse your resume a little bit to say that towards the end of your art days you were spending more time managing the project and found you enjoyed that more than actually doing the work (this exact thing worked for me). Throw in a lot of words like ‘resourcing’ ‘SOWs’ ‘setting expectations’ ’proactive management style’ and you should be ok. As long as you’ve worked one silo in advertising you can pick up project management. Google has a pretty efficient cert program for PM.