Optional ReadonlyuploadThe request to upload the device's keys.
Could be None if the device keys have already been uploaded.
ReadonlyuploadThe request to upload the cross-signing signatures.
ReadonlyuploadThe request to upload the cross-signing keys, as a JSON-encoded string.
This request does not have a request ID, and mark_request_as_sent does
not need to be called for this request, so only the request body is
provided.
The requests needed to upload the cross-signing data to the server