dab exec quoting (escaping)

Hello All, :)

I spend really a lot of time to find out how can I pass quoted line to dab exec.. but it does not work for me :(
google has no examples also..

for example:
should be run on vm machine how can I use dab exec in this case?
Do I have to escape it and how (I tried, but it does not work either)

Please help, what i am missing?