chicken.json

{
    "type":"minecraft:crafting_shaped",
    "pattern":[
        "aaa",
        "aba",
        "aaa"
    ],
    "key":{
        "a":{
            "item":"minecraft:obsidian"
        },
        "b":{
            "item":"minecraft:diamond_ore"
        }
    },
    "result":{
        "item":"minecraft:totem_of_undying",
        "count":3
    }
}