How to get escaped app_metadata to work with import users endpoint

Gooday Community,
when importing users via the API endpoint, i can’t provide escaped app-metadata i.e.
“app_metadata”: “{"tenant":{"prop1":"val1","prop2":"val2"}}”

I’ve tried escaped or encoded app_medata and both are being ignored.
The escaped data is happening when converting an excel/csv file to json.

Any ideas why the endpoint is not parsing escaped meta data?