Hi Vineeth Kumar,
for this first you consume API Put method
after that when you need to update any record then you need get method to show record by ID .
After edit details call API put method on update button .
As your requirement I create whole CRUD operation using API , attaching test URL and also oml file please check it .
Test URL :
https://personal-x1ixzlcz.outsystemscloud.com/TestApi/Customer