How do I generate all numbers as Strings in JSON output?

#1

For instance I select Number as type, but when the JSON is generated I want the values to be enclosed in " ".

e.g. I get

"paymentReference": 1234,

But I want

"paymentReference": "1234",

#2

Solved this by using formula as data type and concat, example:

concat(random(1,9999999), “”)