I have a quest where you have to mine 8 iron, smelt it, and deliver the ingots

Stuck on the smelting part, right now i have it as

    '2':
      use-block-names:
      - furnace
      use-block-amounts:
      - 1
      use-block-durability:
      - 0

it shows in the chat "Use Furnace (0/1)"

But it doesnt update when I use a furnace

Can anybody help?