customer.io per_user_data nested objects

gistfile1.txt

{
    "data": {
        "headline": "Roadrunner spotted in Albuquerque!",
        "date": 1511315635,
        "text": "We received reports of a roadrunner in your immediate area! Head to your dashboard to view more information!"
    },
    "per_user_data": [
        {
            "id": "wiley",
            "data": {
                "voucher_code": "FESwYm"
            }
        },
        {
            "email": "road@runner.net",
            "data": {
                "voucher_code": "cYm6XJ"
            }
        }
    ]
}