VizJSON.json

// Initial Bar Graph 
"subscribers": [
  {
    "subscriber_idx": 2,
    "num_records": 200,
    "practice_name": "practice_name2"
  },
  {
    "subscriber_idx": 3,
    "num_records": 300,
    "practice_name": "practice_name3"
  }
]

// By message type
"subscribers": [
{
  "subscriber_idx": 2,
  "practice_name": "practice_name2",
  "msg_type_info" : [
  {
    "num_records": 100,
    "msg_type": "Direct"
  },
  {
    "num_records": 200,
    "msg_type": "Reminder"
  }
  ]
},
{
  "subscriber_idx": 3,
  "practice_name": "practice_name2",
  "msg_type_info" : [
  {
    "num_records": 300,
    "msg_type": "Direct"
  },
  {
    "num_records": 400,
    "msg_type": "Reminder"
  }
  ]
}
]

// "address": 
// "longitude": 32.0023,
// "latitude": 32.0023,