Get a specific contact

{
    "data": {
        "_list_name": "List6eaG4lGIc9",
        "address_city": "Nevada",
        "address_country": "US",
        "address_line_1": "Block 2",
        "address_line_2": "Cool Bldg.",
        "address_postal_code": "36063",
        "address_state": "Las Vegas",
        "contact_id": 552802,
        "custom_1": "Custom 1",
        "custom_2": "Custom 2",
        "custom_3": "Custom 3",
        "custom_4": "Custom 4",
        "date_added": "1436160803",
        "email": "ellen@diaz.com",
        "fax_number": "+16783270696",
        "first_name": "Ellen",
        "last_name": "Diaz",
        "list_id": 428,
        "organization_name": "Awesome Organization",
        "phone_number": "+16783270696"
    },
    "http_code": 200,
    "response_code": "SUCCESS",
    "response_msg": "Here are your data."
}