bedrock-samples/resource_pack/render_controllers/snow_golem.render_controllers.json

{
  "format_version": "1.8.0",
  "render_controllers": {
    "controller.render.snowgolem": {
      "arrays": {
        "textures": {
          "Array.skins": [ "Texture.default" ]
        }
      },
      "geometry": "Geometry.default",
      "materials": [
        { "*": "Material.default" },
        { "head*": "Material.head" }
      ],
      "textures": [ "Array.skins[0]" ]
    }
  }
}