{"message":"Use POST with user_id to delete Meta data","endpoint":"/facebook-data-deletion","method":"POST","required_body":{"user_id":"your-user-uuid"},"example":{"url":"https://app.zipto.io/facebook-data-deletion","method":"POST","headers":{"Content-Type":"application/json"},"body":{"signed_request":"encoded_signature.encoded_payload","note":"Meta sends signed_request for verification. For testing, you can send user_id directly (not recommended in production)"}}}