| key | (optional) string | The notification template key. | [default to undefined] |
| medium | (optional) TemplateMediumDto | | [default to undefined] |
| globalVariables | (optional) Array<TemplateVariable> | Global variables available to all templates for this tenant (e.g. __global., __recipient, __util., __dateTool., __esc.). Includes both data variables and function-type helpers. | [default to undefined] |
| templateVariables | (optional) Array<TemplateVariable> | Template-specific variables for the given key and medium (e.g. approverPath, requester, attributes). | [default to undefined] |