@minecraft/creator-tools/data/content/newitemjson/entity_resources.json

Minecraft Creator Tools command line and libraries.

{
  "format_version": "1.8.0",
  "minecraft:client_entity": {
    "description": {
      "identifier": "examplens:examplename",
      "min_engine_version": "1.8.0",
      "materials": {
        "body": "blaze_body",
        "head": "blaze_head"
      },
      "textures": {
        "default": "textures/entity/examplename"
      },
      "geometry": {
        "default": "geometry.examplename"
      },
      "animations": {
        "look_at_target": "animation.common.look_at_target"
      },
      "animation_controllers": [],
      "render_controllers": ["controller.render.blaze"],
      "spawn_egg": {
        "texture": "spawn_egg"
      }
    }
  }
}