NaturesAura/src/main/resources/data/naturesaura/recipes/animal_spawner/mule.json

{
    "type": "naturesaura:animal_spawner",
    "ingredients": [
        {
            "item": "naturesaura:birth_spirit"
        },
        {
            "item": "minecraft:leather"
        },
        {
            "item": "minecraft:chest"
        },
        {
            "item": "minecraft:apple"
        }
    ],
    "entity": "minecraft:mule",
    "aura": 100000,
    "time": 100
}