{
  "contacts": [
    {
      "_id": 1,
      "name": "Jack",
      "phone": "123"
    },
    {
      "_id": 2,
      "name": "Jill",
      "phone": "456"
    },
    {
      "_id": 3,
      "name": "Mary",
      "phone": "789"
    }
  ]
}