var data = [
   {
      name: "item name",
      nestedData: [{
         name: "nested name",
         quantity: 1
      },
      {
         name: "nested name 2",
         quantity: 2
      }
      ]
   },
   {
      name: "item name 2",
      nestedData: [{
         name: "nested name 3",
         quantity: 3
      }
      ]
   }
];