How to Create an Array of Arrays?

#1

I need to create some JSON data where there is an array of arrays, for example:

{
    "headers": [
        [
            {
                "field1": "string",
                "field2": "string",
                "field3": "string"
            }
        ],
        [
            {
                "field1": "string",
                "field2": "string",
                "field3": "string"
            }
        ]
    ]
}

I am having trouble getting the most deeply nested arrays (under ‘headers’) due to not having a field name. I tried using a hidden field, but that didn’t work. Any suggestions how I can get this schema?

#2

Fixed by putting [x] after the headers item to generate an array of x arrays.

#3

I’m back. Now I’m needing an array of arrays where each array does NOT contain a JSON object.

Example:

"data": [
   [
      "1233",
      "1234",
      "1235",
      "1236"
   ],
   [
      "9876",
      "9877",
      "9874",
      "9875"
   ]
]

I am unable to create the nested arrays without the accompanying curly brackets. Can anyone please provide guidance?