Creates a new file upload session. If this operation returns successfully, the ID returned as part of the response object shall be used to refer to the file in all subsequent upload and scanning operations.
the number of bytes representing the size of the file to-be-uploaded.
Success
a UUID to uniquely identify a particular file upload
the size of the file in bytes
the number of bytes to upload in each chunk upload request
an RFC2045 media type that describes the underlying content type