We often use JSON while working with API's in Filemaker. JSON array vs JSON Object could be simply termed as list vs key-value pair. JSON array is the collection of order values with [], while the JSON object is a collection of unordered key, value pair with curly braces { }.

Both JSONSetElement and JSONFormatElements functions will automatically alphabetize key/value pairs within JSON objects. but that can change the order of elements we specified with respect to the result.

Check out this example of the stealth array approach, where you can create an array of objects. In this way, we are controlling the order. Then use the substitute function to replace everything we don't want.