Subscribe to specific row

I'm trying to subscribe to changes on table game_rooms where the row has a column named nickname with a value of x
 const gameRooms = supabase
        .from(`game_rooms:nickname=eq.${gameRoomNickname}`)
        .on("*", (payload) => {
            console.log("Change received!", payload)
        })
        .subscribe()

this throws an error though, although it follows the example from the API page. What seems to be wrong with it?
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