I've spent quite a bit of time on this trying to figure out what is supported in pipelines when it comes to objects, arrays, and nested arrays of objects (your question). If I understand the docs correctly, nested arrays within an object are not supported*(emphasis mine; I could be wrong on support as well).
I've managed to work out an option for you should you have a nested array with objects. You'll have to work out the details though for your specific use case.
I couldn't figure out how to get to the nested array from within the object, so I did resort to fudging some data as a POC.
Assumptions: one pipeline where you fetch json, then iterate over it - using the sample scheme (valid) provided, you can get to the modules path, but you'll have to pass (call another pipeline that expects json) the array data as json.
*from JSON Handler details: https://helpv2.quickbase.com/hc/en-us/articles/4471024972308-JSON-Handler-details
EXAMPLE 3 (NOT SUPPORTED)
{"name": "Gilbert", "wins": [["straight", "7♣"], ["one pair", "10♥"]]}
{"name": "Alexa", "wins": [["two pair", "4♠"], ["two pair", "9♠"]]}
{"name": "May", "wins": []} <- this
{"name": "Deloise", "wins": [["three of a kind", "5♣"]]}
There is a specific JSON payload standard called JSON lines which is currently not supported and should be implemented in future. More information about it can be find here http://jsonlines.org/
