jqGrid json data

I have an example that works properly:

   $(function() { 
      $("#treegrid").jqGrid({ 
          url: 'tree2.json', 
          datatype: 'json', 
          mtype: 'GET', 
          colNames: ["ID", "Description", "Total"], 
          colModel: [{ 
              name: 'id', 
              index: 'id', 
              width: 1, 
              hidden: true, 
              key: true 
          }, { 
              name: 'desc', 
              index: 'desc', 
              hidden: false, 
              sortable: true 
          }, { 
              name: 'num', 
              index: 'num', 
              hidden: false, 
              sortable: true 
          }], 
          height: 'auto', 
          width: '500', 
          pager: "#ptreegrid", 
          caption: "Tree Grid Example" 
      }) 
  }); 

JSON data

{ 
    "page": 1, 
    "total": 1, 
    "records": 2, 
    "rows": [ 
       {"id": 1, "cell": ["1", "Source 1", "300"]}, 
       {"id": 2, "cell": ["2", "Source 2", "100"]}
    ] 
} 

How to order jqGrid to read this type of JSON data?

{ 
    "page": 1, 
    "total": 1, 
    "records": 2, 
    "rows": [ 
       {"id": 1, "cell": {"id":"1", "desc":"Source 1", "num":"300"}}, 
       {"id": 2, "cell": {"id":"2", "desc":"Source 2", "num":"100"}}
    ] 
}

Probably you mean the format of data:

{ 
    "page": 1, 
    "total": 1, 
    "records": 2, 
    "rows": [ 
       {"id":"1", "desc":"Source 1", "num":"300"}, 
       {"id":"2", "desc":"Source 2", "num":"100"}
    ] 
}

without duplication of id and the unneeded cell property. To read the data you need include jsonReader: {repeatitems: false} option of jqGrid (see the documentation).