Timer template

Hi everyone,

I’m trying to make a timer template but I can’t put the “timeDuration” property in the event, some ideas?

Best Regards,

Ignacio

PS: I tried with something like that and with some changes but with no result.

"appliesTo": [
  "bpmn:Event"
],
"entriesVisible": {
    "documentation": true
},
"properties": [
   {
 
    "type": "String",
    "value": "#{expireDate}",
    "binding": {
      "type": "property",
      "name": "bpmn:timeDate"
    }
  }