As I said on your other thread, the inner attribute of a Filled Out Form activity reflects the processed POST payload. It is stored as a serialized PHP object, not as a JSON object. Your app needs to know how to deserialize it. Presumably your integration app is broken and can't handle the nesting of CSV, JSON, and PHP. That's not a problem with the data, it's a problem with the app. Any modern language can handle this kind of data.
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