jsoncpp - How to use C++ Json to decode serialized std::map -

how should decode following json serialized map data used jason cpp.

{"offsettable":{{"brokername":"testbrokerudp-02","queueid":0,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":1,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":2,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":3,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":4,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":5,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":6,"topic":"vincent_topic"}:0,{"brokername":"testbrokerudp-02","queueid":7,"topic":"vincent_topic"}:0}}