problem with json structre mongodb

[Anonymous]

Hello Community

I have a json file which contains a lot of nested objects and arrays i want to import it and do a transformation on the id field which is a primary key and then i want to store this file on mongodb.
I tried with this job 

but the problem is that the document stored on mongodb has lost its structure the content of the nested arrays has become a string .

You will find attached the two json files input.json and output.json to more understand the problem.

can you help me solve this problem even with another job that you propose ?

Thank you all.