curl --request POST \
  --url https://xx.xxx.xxx/api/manage/admin/connector/run-once \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "connector_id": 123,
  "credential_ids": [
    123
  ],
  "from_beginning": false
}
'

{
  "success": true,
  "message": "<string>",
  "data": 123
}