We use google tag manager to implement most of our scripts and event tracking (like for SalesIQ, which works fine) is it possible to use the MarketingHub code in GTM?  I inserted it as custom HTML and I can see the tag firing in my preview mode (within Google) but I am unable to get it to validate or capture data in MarketingHub itself.  

Am I doing something wrong? 

Thanks! 

PS Marketing Hub so far has been awesome!