Nginx proxy remove specific path and empty Post request body + HTTPS

I'm using nginx for web service proxy. I have rest service as below and i want to proxy my domainhttps://www.example.com/myRestservice. Service has some method like this;

http://1.1.1.1:123/api/work/method1http://1.1.1.1:123/api/work/method2

*By the way services publish on two server as below in nginx.conf

As result i want to access to methods of service like "https://www.example.com/Restservice/api/work/method1"..

When i try to use rewrite in nginx as below, i can access service.But in this time Post method's request body is emty. I can see service logs.

In my nginx.config

upstream RestService {    server 1.1.1.1:123;    server 1.1.1.2:123;}server {        listen                443 ssl;        server name           https://www.example.com; location ~ ^/Restservice/ {    add_header Access-Control-Allow-Origin *;    rewrite ^/Restservice/(.*) /$1 break;    proxy_pass http://Restservice/;    proxy_http_version  1.1;}}

Bye the way i try to location part like this, result is same.

  location   /Restservice {     proxy_pass http://Restservice/;}

Normally I can access soap service with config from https link.Is it about http redirection to https ?

In nginx access log;status : 500request: POST /Restservice/api/work/method1 HTTP/1.1