Custom items as target

So I am wondering if it is possible to use custom items as items that should be collected.

I see that the plugion can give custom item rewards (with the skinID) but I dont see it for the items collected.

In the editor i see:

 

Target: specify ShortName, SkinID, or select using the button next to it.

But I don't know how to use it. Do I use the shortname plus skinID, or only the SkinID?

The server gives weed-flowers with about 5% of alle the hemp plants when picked up. I have a quest where you need to harvest 100 hempflowers (shortname: sticks  SkinID: 3599034897) where it gives a reward 2 refined gold bars (custom item).
 

"QuestID": 48108,
    "QuestDisplayName": "The supply of weed flowers is depleted",
    "QuestDisplayNameMultiLanguage": "",
    "QuestDescription": "People love their weed—it helps them forget their troubles… and apparently everything else too. Unfortunately, the stock has run out, and now everyone remembers their problems again.\n\nThat’s where you come in.\n\nCollect 100 hemp flowers and bring them to me before the entire city loses its mind.\n\nDo that, and I’ll reward you generously… and maybe restore some peace and quiet around here.",
    "QuestDescriptionMultiLanguage": "",
    "QuestMissions": "Grow 100 of hemp plants and hand them over to me",
    "QuestMissionsMultiLanguage": "",
    "QuestPermission": "",
    "QuestType": 16,
    "Target": "sticks, 3599034897",
    "IsReturnItemsRequired": true,
    "IsMultiLanguage": false,
    "ActionCount": 1,
    "IsRepeatable": false,
    "Cooldown": 0,
    "PrizeList": [
      {
        "PrizeName": "",
        "PrizeType": 2,
        "ItemShortName": "metal.refined",
        "ItemAmount": 2,
        "CustomItemName": "Refined Gold",
        "ItemSkinID": 3651922720,
        "PrizeCommand": "",
        "CommandImageUrl": "",
        "IsHidden": false
      }
    ]
  }

Is it possible to make that happen?