[{

 "advertiserName":"test_json",
  "name_prefix":"prebid_march_12",
  "custom_key":"hb_pb",
 "priceRane": [
    {"start": 0.10, "end": 0.20, "increment": 0.01}
  
  ],
  "creativeSize":[
    {"width": 300, "height": 250},
    {"width": 336, "height": 280},    
    {"width": 1, "height": 1}
  ],
  "targeting": {
    "inventoryTargeting": {
        "targetedAdUnits": [] ,
        "targetedPlacementIds": []            
        

        },
        "countryTargeting":{
          "countryCodes":[]
         
        }

    }
   
  

}
]