String my_json =
    "[
        {
            "location_id": "1",
            "screen_id": "301",
            "priority": [
                "1",
                "2",
                "3",
                "4"
            ],
            "vendor_id": [
                "2",
                "3",
                "5",
                "1"
            ]
        }
    ];"

id       location_id       screen_id       vendor_id       priority

1             1                300             1              1

2             1                300             2              2

3             2                304             4              1

4             2                304             6              2