JSON数组解析不显示输出

[  
   {  
      "MAP_COORDINATES":
          "[[32.732695279933104,74.86289978027344],
            [32.72749665793957,74.85431671142578],
            [32.72143121579454,74.85963821411133],
            [32.72200889472774,74.88521575927734]]"
   }
]
[  
   {  
      "MAP_COORDINATES":
          "