Server API post JSON data array

I need to POST data from an API source, to another API destination. Fully server side.

Getting the data from the API source is no problem. The POST to the destination should be something like this:

[
    {
        "client_id": 113974,
        "table_name": "customers",
        "sequence": 1565881320,
        "key_names": [
            "id"
        ],
        "data": {
            "id": 1,
            "name": "Finn"
        },
        "action": "upsert"
    }
]

Especially the array’s are a problem, I’m not sure how to process this in Wappler. Any docs that can point me in the right direction?