Официальная документация
Структура объекта нотификации
{
"response": {
"count": 2428,
"items":
[
{
"id": 54832560,
"first_name": "Anyutka",
"last_name": "Kiseleva",
"photo_50": "http://cs417830.v...4a7/Y-zZa02zvmQ.jpg"
},
{
"id": 221194575,
"first_name": "Lera",
"last_name": "Chistova",
"photo_50": "http://cs322328.v...0fb/qi2nofkqneI.jpg"
}
]
}
}