Webservice Issue

Hi Experts,

In general we are creating screens in SAP Cloud. Whenever we are enter elements data it stores into repository data, and it generate SAP Studio GUID for the record.

I have a requirement to connect “SAP Studio data” and “SAP System” with webservice.

Need to create one custom button in studio, anyone click on this button it connects with SAP System with repository data record GUID and creates new GUID in SAP System for the same record and come back with new SAP System GUID into SAP studio.

Please help me how to achieve this.