async def METHOD_NAME(self, session_id: str, name: str):  # pragma: no cover
    body_args = (
        deserialize_serializable(self.request.body) if self.request.body else None
    )
    index = body_args.get("index")
    value = body_args.get("value")
    timestamp = body_args.get("timestamp")
    oscar_api = await self._get_oscar_mutable_api(session_id)
    res = await oscar_api.write(name, index, value, timestamp)
    self.write(serialize_serializable(res))