{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "additionalProperties": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "status": {
        "type": "string",
        "enum": ["idle", "fetching-manifest", "downloading", "done", "error"]
      },
      "progress": {
        "type": "number"
      },
      "error": {
        "type": "string"
      }
    },
    "required": ["status", "progress"]
  },
  "default": {}
}