And Power Automate is NOT having it. In some cases I get an 'internal server error' without further elaboration, other times the flow executes the action just before the HTTP post repeatedly until it crashes.
In the code view, it shows the JSON string variable in double quotes, which I can see causing problems. It doesn't show in the edit view of the body though, so I don't know how to prevent it.
Has anyone been able to use JSON built from a string variable in a HTTP request body before? I would think it would be a fairly common thing but can't find examples.

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