Importing PDF of checklist

I have a pdf version of my checklist as provided by the manufacturer. I see there is a way to export a JSON to make mass changes or tweak things external to the cloud editor and reimport. Is there a pattern for merging my already made pdf checklist into the system? I successfully used the AI assistant to make a JSON out of my pdf but haven’t been able to successfully import it. (the JSON it creates looks rather basic and not in the “Mira format”).