curl --request POST \
  --url https://{operatorDomain}/v1/admin/quote-versions/{quoteVersionId}/send \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "channel": "email",
  "message": "<string>"
}
'

{
  "quoteVersion": {
    "id": "qver_01h...",
    "quoteId": "<string>",
    "version": 123,
    "status": "draft",
    "currency": "EUR",
    "totalAmount": 123,
    "createdAt": "2023-11-07T05:31:56Z"
  },
  "proposalUrl": "<string>"
}