1.
Linux

curl -d '{"bank_name":"Bank ABC","country":"Kenya"}' -H 'Content-Type: application/json' http://127.0.0.1:8080/addbank

2.
Windows

curl -H "Content-type:application/json" --data-binary "{\"bank_name\":\"Bank ABC\",\"country\":\"Kenya\"}" http://127.0.0.1:8080/addbank

3.
Json response

{
  "status_code": 0,
  "status_description": "Successful"
}