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

Minecraft Creator Tools command line and libraries.

{
  "format_version": "1.21.80",
  "minecraft:entity": {
    "description": {
      "identifier": "examplens:examplename",
      "spawn_category": "monster",
      "is_spawnable": true,
      "is_summonable": true,
      "is_experimental": false
    },
    "component_groups": {},
    "components": {
      "minecraft:type_family": {
        "family": ["monster"]
      }
    },
    "events": {}
  }
}