{
  "type": "object",
  "required": [
    "file_type",
    "size",
    "filename",
    "file_format"
  ],
  "properties": {
    "file_type": { "type": "string"},
    "size": { "type": "integer"},
    "filename": { "type": "string"},
    "file_format": { "type": "string"}
  },
  "additionalProperties": false
}