minecraft-bedrock-json-schemas/source/general/block_definition.json

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "title": "Block",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "name": { "title": "Name", "description": "The block id, for example: 'minecraft:air'", "type": "string" },
    "states": {
      "title": "States",
      "description": "The block states",
      "type": "object",
      "additionalProperties": { "title": "State", "description": "A single state of a block", "oneOf": [{ "type": "string" }, { "type": "boolean" }, { "type": "number" }] }
    }
  }
}