See JSON in TiddlyWiki for an overview of using JSON in TiddlyWiki.
JSON data is just plain text, and so there are an wide variety of techniques to generate it in wikitext.
At a high level, we have several ways to generate JSON data in TiddlyWiki's own tiddler format:
When constructing JSON data manually, the jsonstringify Operator is needed to ensure that any special characters are properly escaped.