This illustration shows the Postman window. It has selected the PUT method, the URL bar contains the link to the employees API, the Body, raw, and JSON (application/json) options are selected. The body textbox contains the following text:
{"firstName":"Laura",
"lastName":"Jones",
"email":"laura.jones@example.com",
"phone":"1203123",
"birthDate":"1975-05-14",
"title":"Manager",
"dept":"Sales"}. 
Below that the body response is shown and contains the following text: "{\"status\":\"OK\"}"