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

{
  "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" }]
      }
    }
  }
}