Decode event encoded as JSON by processor

def from_json(data):
        """Decode event encoded as JSON by processor"""

        parsed_data = json.loads(data)
        trigger = TriggerInfo(
            parsed_data['trigger']['class'],
            parsed_data['trigger']['kind'],
        )

        # extract content type, needed to decode body
        content_type = parsed_data['content_type']

        return Event(body=Event.decode_body(parsed_data['body'], content_type),
                     content_type=content_type,
                     trigger=trigger,
                     fields=parsed_data.get('fields'),
                     headers=parsed_data.get('headers'),
                     _id=parsed_data['id'],
                     method=parsed_data['method'],
                     path=parsed_data['path'],
                     size=parsed_data['size'],
                     timestamp=datetime.datetime.utcfromtimestamp(parsed_data['timestamp']),
                     url=parsed_data['url'],
                     _type=parsed_data['type'],
                     type_version=parsed_data['type_version'],
                     version=parsed_data['version'])