[
  {
    "id": "mobile_samsung_s10",
    "latitude": "50.09",
    "longitude": "19.94",
    "cellId": "Chn0000"
  },
  {
    "id": "mobile_samsung_s20",
    "latitude": "50.05",
    "longitude": "19.95",
    "cellId": "Chn0002"
  },
  {
    "id": "emergency_police_111",
    "latitude": "50.035",
    "longitude": "19.97",
    "cellId": "Chn0002"
  }
]