I have the following table called module_data. Currently it has three rows of entries:
id data
0ab5203b-9157-4934-
One other option which may be sufficient for other people who've found this page is to just cast the column to text type. Eg
select * from module_data where data::text like '%Board%'
Note though, this will search over the entire json and should only be used if you can guarantee the other fields won't be a problem.