i\'m new to retrofit,below is the json
{ \"response\": \"success\", \"servicecode\": \"134\", \"forecast\": { \"month\": { \"jan\": [ {
I would do it with a custom Json adapter using Gson lib. So you won't have to touch your data structures (if you can not anyway) neither add your infinite key 555.
https://www.tutorialspoint.com/how-to-implement-custom-jsonadapter-using-gson-in-java