Всем привет. Есть json массив
{"status":1,"response":{"AK-47 | Aquamarine Revenge (Battle-Scarred)":{"price":1045,"quantity":63},"AK-47 | Aquamarine Revenge (Factory New)":{"price":2928,"quantity":70},"AK-47 | Aquamarine Revenge (Field-Tested)":{"price":1300,"quantity":264},"AK-47 | Aquamarine Revenge (Minimal Wear)":{"price":1997,"quantity":141},"AK-47 | Aquamarine Revenge (Well-Worn)":{"price":1163,"quantity":125},"AK-47 | Black Laminate (Battle-Scarred)":{"price":995,"quantity":18},"AK-47 | Black Laminate (Factory New)":{"price":7929,"quantity":12},"AK-47 | Black Laminate (Field-Tested)":{"price":886,"quantity":99},"AK-47 | Black Laminate (Minimal Wear)":{"price":1045,"quantity":154}
И т.д.
Необходимо сделать такой
{"AK-47 | Aquamarine Revenge (Battle-Scarred)":{"last_updated":1467615630,"quantity":149,"value":632},"AK-47 | Aquamarine Revenge (Factory New)":{"last_updated":1467615630,"quantity":65,"value":2796}
т.е добавить поле last_update, с временем и изменить price на value. Как такое реализовать?