curl --request POST \
  --url https://{operatorDomain}/v1/public/newsletter/subscribe \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com",
  "consent": true,
  "locale": "<string>"
}
'

{
  "ok": true,
  "status": "pending_double_opt_in"
}