curl --request POST \
  --url https://api.example.com/notifications \
  --header 'Content-Type: application/json' \
  --data '
{
  "externalId": "<string>",
  "reason": "<string>",
  "metadata": {}
}
'

{
  "tenantId": "<string>",
  "id": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "externalId": "<string>",
  "reason": "<string>",
  "metadata": {},
  "updatedAt": "2023-11-07T05:31:56Z"
}