post https://example.com/v1/edit
This method makes changes to an existing submission. Only values supplied within the API arguments will be overwritten.
File uploads are not currently supported
Update the specified submission
POST /api/v1/edit HTTP/1.1
Host: www.formstack.com
api_key=[[app:api_key]]&id=10001&field_1001=John&field_1002=Smith
curl -X POST -i -d "api_key=[[app:api_key]]&id=10001&field_1001=John&field_1002=Smith" https://www.formstack.com/api/v1/edit