Updating an event action with a subscription

This example updates an event action using changeMode:ADD/UPDATE or deletions:

mutation
{
eevUpdateExternalEventAction
    (repositoryIdentifier:"<objectStoreSymName>"
    identifier: "<eventActionId>"   #event action id
    externalEventActionProperties:  #optionally update event action properties
    {
      type:WEBHOOK
      name:"<eventActionNewName>"
      isEnabled: true
      cmTransactionTimeout: 120
    }
    subscriptions:   #update subscriptions
    {
      changes: [
        {
          type: INSTANCE   #INSTANCE or CLASS
          changeMode:ADD   #add new subscription
          name: "Additional Subscription"   #name required for changeMode ADD
          descriptiveText: " Additional Subscription Description"
	   subscriptionTarget:
	      {
	        classIdentifier:"Document/Folder"
	        identifier:"<docId>/<folderId>/<folderPath>"
	      }
	      subscribedEventClassIdentifiers:
	      [
	        "UpdateEvent"   #event of interest
	      ]
        },
       {
         type: INSTANCE   #INSTANCE or CLASS accordingly
         changeMode: UPDATE   #update an existing subscription
         id: "<eventSubscriptionIdtoUpdate>"   #id is required
         isEnabled: false
         subscribedEventClassIdentifiers:
          [
            "UpdateEvent", "DeletionEvent"
          ]
        }
      ],
      deletions: [    #deletion by subscription id
		"<eventSubscriptionIdtoDelete>"
      ]
    }
  )
  {
  id
  name
  owner
  progId
  eevExternalEventReceiverURL
  isEnabled
  cmTransactionTimeout
  }
}