JSON to base64 for email templates for pixel tracking

Hi, all!
Is some one has experience with converting data from json to base64 in auth0 rules, hooks or maybe in the email templates by liquid syntax?
Maybe some one could advise the better way (where and how) convert data to base64 and provide converted to email templates as user_metadata ?
Need it to implement tracking pixel api

Hi @pcherevko,

Welcome to the Auth0 Community!

It looks like we are working through a similar question here:

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