How to Nsmutabledictionary values add to Nsmutablearray

My Json format like[{"id":1,"name":"xyz"}{"id":1,"name":"xyz"}{"id":1,"name":"xyz"}] so here i want put new dictionary value .so my new json format [{"id":1,"name":"xyz","job":"gg"}{"id":1,"name":"xyz","job":"gg"}{"id":1,"name":"xyz","job":"gg"}] please help me.