Variables

In dynamic block request body, you can use Full Subscriber Data variable, that contains all subscriber’s information:

{
    "id": 13245647xxxxxxxxx,
    "user_ns": "f3245647xxxxxxxxx",
    "page_id": 234564657xxxxxxxx,
    "status": "active",
    "first_name": "Subscriber",
    "last_name": "Lastname",
    "name": "Subscriber Lastname",
    "gender": "male",
    "image": "https://xxxxxxxxx.com/xxxxxx.jpg",
    "locale": "en_US",
    "language": "English",
    "timezone": "UTC-07",
    "last_input_text": "Last subscriber's input text",
    "subscribed": "2018-07-02T00:00:00+00:00",
    "last_interaction": "2018-07-02T00:00:00+00:00",
    "last_seen": "2018-07-02T00:00:00+00:00",
    "custom_fields": {
        "customField": 0.75,
        "customDate": "2018-05-31",
        "customBool": true,
        ...
    }

}