Just looked at the last webinar video as I couldn't join. Very nice explanation and product discoveries.
I've seen that the https://jsoneditoronline.org/ tool is used to identify the parser. If the tool is nice, I found some time ago a very handy one, avoiding errors since as it identifies the exact expression for you, by just selecting the data you are looking for in the right hand window. The link is : JSON Path Finder.
As it saved me quite some time in the past, I thought it might be useful to others, thus sharing here.
Here an exemple with a blebox API expression. Just do not copy the "x." in the expression to get the correct one to past in CC.
Customer support service by UserEcho