How to handle a large JSON object?

I have a rather simplistic JSON Object of this structure: 

{"id":<someid>,"value":<some string>,"details": 
 [{"id":<someid>,"value":<some string>,"details": 
  [{"id":<someid>,"value":<some string>,"details":  
   [{"id":<someid>,"value"}
   ,{"id":<someid>,"value"} 
   ,{"id":<someid>,"value"} ]
  ,[{"id":<someid>,"value":<some string>,"details":  
     [{"id":<someid>,"value"}
    ,{"id":<someid>,"value"} ] ]
 ,{"id":<someid>,"value":<some string>} ] } 
   

The depth and number of depth elements are variable.
It's a finger snip to work it down with  %DynamicObject.
BUT:
The object I try to handle has a size of 78 MByte in a file.
%DynamicObject fails with <MAXSTRING>  and  
%Stream.DynamicCharacter fails with <STORE>.
My attempt with Python also failed by not enough memory

Are there any ideas on how to proceed ?