curl --request POST \
  --url https://api.example.com/Merchants/agreements \
  --header 'Content-Type: application/json' \
  --data '
{
  "scheme": "<string>",
  "schemeData": {},
  "test": true,
  "dataSourceHandle": "<string>"
}
'

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}