How to create a multipart request with custom json data in request?

I want to create a multipart request with custom json data in request.

The JSON Request should be like this.

{  "name": {      "fName": "fName",      "lName": "lName"  },  "age": "age",  "gender": "gender",  "otherDetails": {      "otherDetails1": "otherDetails1",      "otherDetails2": otherDetails2  }  }  

How to add this kind of JSON in multipart request with any file in the request?

https://stackoverflow.com/questions/67327684/how-to-create-a-multipart-request-with-custom-json-data-in-request April 30, 2021 at 11:05AM