UploadFile Object 
- type'file' -- file.
- filePathstring - Path of file to be uploaded.
- offsetInteger (optional) - Defaults to- 0.
- lengthInteger (optional) - Number of bytes to read from- offset. Defaults to- 0.
- modificationTimeDouble (optional) - Last Modification time in number of seconds since the UNIX epoch. Defaults to- 0.