JSON Array Iteration

It looks like your use case is a little different than mine.  I actually receive the Customer IDs (or Part IDs in your case) two different ways in the data from my other application.  I get it like you do (I had left this part out of my original schema sample I showed previously just due to length):

...
    "DateModified": "2025-06-12T16:19:02-05:00",
    "CustomerIDs": [
        405
    ],
    "SiteIDs": [
        778
    ],
    "Customers": [
        {
            "ID": 405,
            "CompanyName": "CompanyA",
            "GivenName": "",
            "FamilyName": ""
        }
    ],
...

So I get "CustomerIDs" in an array, but I also get additional data (including the ID) in the "Customers" array.

If I recall, I had difficulty pulling data from the CustomerIDs array which is why I started using the Customers array.  The only info I'm pulling is the ID, so if I could have gotten CustomerIDs to work I would have used that.  I know when I look at what's available to me for that step in the Quick Reference Widget, CustomerIDs has the icon (and different color) that I assume indicates it's an array. However, it doesn't expand like the Customers array does.  I assume it has something to do with that but don't know exactly what.

So unfortunately I don't know if I can be much more help.  Maybe someone else will have some additional information