{
      "comments": "Testing",
      "quantity": 0,
      "retailerId": 0,
      "retailerquote": 0,
      "subProductId": 999,
      "unit": "kg",
      "wholesalerid": 999
}

HashMap<String,String> header = new HashMap<String, String>();
                header.put("Content-type","application/json");
                HashMap<String,String> data = new HashMap<String, String>();
                data.put("comments",comments);
                data.put("quantity",quantity);
                data.put("retailerId",retailerID);
                data.put("retailerquote",retailerQuote);
                data.put("wholesalerId",wholesalerID);
                data.put("unit",unit);
                data.put("subProductId",subProductID);

                Call<RequestQuoteCheck> call = RetrofitBaseAdapter.getCommonPathInterfaceRequestQuote().requestQuoteCheck(data);

                call.enqueue(new retrofit2.Callback<RequestQuoteCheck>() {

                    @Override
                    public void onResponse(Call<RequestQuoteCheck> call, Response<RequestQuoteCheck> response) {

                         Toast.makeText(getApplicationContext(),response.message(),Toast.LENGTH_SHORT).show();

                    }

                    @Override
                    public void onFailure(Call<RequestQuoteCheck> call, Throwable t) {

                    }
                });

public static WebserviceMethods getCommonPathInterfaceRequestQuote() {
        final OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .readTimeout(30, TimeUnit.SECONDS)
                .connectTimeout(30, TimeUnit.SECONDS)
                .build();
        Retrofit restAdapterRequestQuote = new Retrofit.Builder()
                .baseUrl(Constants.baseURLforRequestQuote)
                .addConverterFactory(GsonConverterFactory.create())
                .client(okHttpClient)
                .build();
        WebserviceMethods retrofitinterfaces = restAdapterRequestQuote.create(WebserviceMethods.class);
        return retrofitinterfaces;
    }
}

@POST("requestQuoteCheck")
Call<RequestQuoteCheck> requestQuoteCheck(
        @HeaderMap Map<String,String> data );