{
  [
    "campaign_id" : "123",
    "landing_id" : "123"
  ],
  [
    "campaign_id" : "1234",
    "landing_id" : "1234"
  ],
  [
    "campaign_id" : "1235",
    "landing_id" : "1235"
  ],
  [
    "campaign_id" : "1236",
    "landing_id" : "1236"
  ]
}