如何从go map对象访问深度嵌入的json对象？

I am new to go and I understand how to marshall json data into custom predefined Struct types but I'm currently working with a JSON set that can have dynamic keys & values with every call. I can marshall this dynamic data into a map/interface no problem but I'm a little lost with how to access the item that are deeply nested in an array.I am new to go and I understand how to marshall