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{ "version": 1.0,
  layout:
  { "type": "singleColumn",
    "column": ["w1", "w2"], 
    
  },
  widgets:
  {
     "w1" :
        { "type" : "query",
          "refreshPeriod" : 30000,
          "state" : "OPEN",
          "preference" : 
            {
               "id" : "<preference uuid>",
               "configuration" : { 
                 "queryLimit" : 50
               }
            }
        },
    "w2" : {....}
  }
}