Sent Plain JSON as String with Moshi & Retrofit

api_module.kt

want to sent plain json as post request, with retrofit and moshi converter ???

{"id":1,"firstName":"Lokesh","lastName":"Gupta","roles":["ADMIN","MANAGER"]}

Retrofit.Builder()
                .client(client)
                .baseUrl(baseUrl)
                .addConverterFactory(ScalarsConverterFactory.create()) // you need to add this for sending plain json object
                .addConverterFactory(MoshiConverterFactory.create(moshi))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build()