randomJsonDataGenerator.json

[
  {
    'repeat:100': {
      _id: '{{objectId()}}',
      title: '{{lorem(4, "words")}}',
      description: '{{lorem(1, "paragraphs")}}',
      type: '{{random(["apartment"], ["office space"], ["single room"])}}',
      city: '{{city()}}',
      location: '{{street()}}',
      country_state: '{{state()}}',
      area: '{{integer(5000, 50000, "0,0")}}',
      bedroom: '{{integer(1, 10)}}',
      bathroom: '{{integer(1, 10)}}',
      car_parking: '{{bool()}}',
      lift: '{{bool()}}',
      pets: '{{bool()}}',
      security: '{{bool()}}',
      price: '{{integer(1000, 100000, "0,0")}}',
      image: 'file://{{lorem(1, "words")}}/{{lorem(1, "words")}}.jpg'
    }
  }
]

goto http://www.json-generator.com/, paste the code, & click "generate".