Add Structured Data Schema to page html

[Paul_gpvr]

Hi,

How can I add script tags into categories or product descriptions?

I'd like to add "structured data schema" to page html such as the example below, or is there a module that can do this?  There seems to be modules that add all the standard fields automatically, but I've not seen one where you can create your own different one on category or product pages.

Sorry I cant add exact script snippet it wont allow me to post.

 

script type "application/ld+json"

Thanks for any help.