Why do I get a malformed JSON in request body in this cURL call?

I found the answer in the blog post: "Expecting to find valid JSON in request body..." curl for Windows.

For example, for Purge everything --data value will be:

# On Linux
--data '{"purge_everything":true}'

# On Windows
--data "{\"purge_everything\":true}"

For Windows:

1. Replace the single quotes with double quotes: ' --> "
2. Escape the double quotes with a backslash: " --> \"