jQuery Grid Plugin - jqGrid

Hi guys

Could anyone please give me an example of the format required for the return jSon string if you have set formatter:'select' in the colModel.

Example:

 ,{name:'myColExample' ,index:'myColExample',width:50
                                                                     ,search:true ,editable:true, sortable:true
                                                                    ,edittype:'select' , formatter:'select',editrules: { required: true } ,editoptions: { }
                                                                    }

I am returning a jSon string as below which works fine but I just can not find any example of the required format for the select option.

Many thanks.

Example my current jSon format:

{"rows":[{"cell":[355.0,"Arzim, C","Expenses (T)","Legends","Legends","x2.33",8.78,12.0,245.4888],"id":3},{"cell":[1256.0,"Butt, N","Expenses (NT)","","NTFC","x1.5",12.8,6.0,115.2],"id":4},{"cell":[2179.0,"Feere, E","Expenses (T)","Legends","Legends","x1.5",8.95,26.57,356.70225],"id":5},{"cell":[1255.0,"Ferdinand, L","Expenses (T)","NTFC","NTFC","x2",12.5,3.8,95.0],"id":6},{"cell":[355.0,"Arzim, C","","Legends","NTFC","x1",8.78,5.2,45.656],"id":7}],"page":1,"records":5,"total":1,"userdata":{"temporary_total":858.0470499999999,"temporary_units":53.57,"temporary_hourly_rate":"Totals:"}}