diamond_shovel.json

{
    "parent": "item/handheld", 
    "textures": {
        "layer0": "item/diamond_shovel"
    },
    "overrides": [
        {
            "predicate": {
                "custom_model_data": 1
            },
            "model": "item/golden_hoe"
        },
        {
            "predicate": {
                "custom_model_data": 2
            },
            "model": "item/podzol"
        },
        {
            "predicate": {
                "custom_model_data": 3
            },
            "model": "item/brown_dye"
        }
    ]
}