How to import sample data for classified listing like categories & locations

Classified-Listing-Sample-data.json

{
  "locations": [
    {
      "name": "New York",
      "slug": "",
      "description": "",
      "meta": [
        {"image_id" :  45},
        {"_icon" :  ""}
      ],
      "order": 0,
      "child": [
        {"name": "New York", "order": 1 },
        {"name" : "Port Chester", "order": 2},
        {"name" : "Mineola", "order": 3},
        {"name" : "Mount Vernon", "order": 4},
        {"name" : "Hempstead", "order": 5},
        {"name" : "Lynbrook", "order": 6},
        {"name" : "Yonkers", "order": 7},
        {"name" : "Franklin Square", "order": 8},
        {"name" : "Newburgh", "order": 9},
        {"name" : "Buffalo", "order": 10},
        {"name" : "Long Beach", "order": 11},
        {"name" : "Ithaca", "order": 12},
        {"name" : "New Rochelle", "order": 13},
        {"name" : "Freeport", "order": 14},
        {"name" : "Rochester", "order": 15},
        {"name" : "Albany", "order": 16},
        {"name" : "Valley Stream", "order": 17},
        {"name" : "Poughkeepsie", "order": 18},
        {"name" : "Baldwin", "order": 19},
        {"name" : "West Hempstead", "order": 20},
        {"name" : "Schenectady", "order": 21},
        {"name" : "White Plains", "order": 22},
        {"name" : "Uniondale", "order": 23},
        {"name" : "North Valley Stream", "order": 24},
        {"name" : "Ossining", "order": 25}
      ]
    }
  ],
  "categories": [
    {
      "name": "Electronics",
      "slug": "",
      "description": "",
      "meta": "",
      "order": 0,
      "child":[
        {
          "name": "Mobile Phone",
          "order": 1
        },
        {
          "name": "Mobile Phone Accessories",
          "order": 2
        },
        {
          "name": "Computers & Tablets",
          "order": 3
        },
        {
          "name": "Computer Accessories",
          "order": 4
        },
        {
          "name": "TVs",
          "order": 5
        },
        {
          "name": "TV & Video Accessories",
          "order": 6
        },
        {
          "name": "Cameras & Camcorders",
          "order": 7
        },
        {
          "name": "Audio & MP3",
          "order": 8
        },
        {
          "name": "Video Games & Consoles",
          "order": 9
        },
        {
          "name": "Freeze",
          "order": 10
        },
        {
          "name": "Air Conditioner (AC)",
          "order": 11
        },
        {
          "name": "Other Electronics",
          "order": 11
        }
      ]
    }
  ],
  "listings":[
  ]
}

State & City in the USA. @radiustheme
https://github.com/xcyborgoders/USA-States-and-Cities.Json