Reply to Architecting for subscriptions - example code error: SyntaxError: Unexpected token s in JSON at position 0 Add the @ sign to indicate the contents of a file. It's expecting JSON data in place of <FLAT JSON DATA>. Run this: curl -XPOST -H "Content-type: application/json" -d '@simulateExamples/flatJsonExample.json' 'localhost:3000/simulate' App & System Services StoreKit Aug ’20