SendImageModel(SendImageModel)

{
    "guid": "",
    "to_username": "",
    "file_id": "",
    "aes_key": "",
    "file_size": 0,
    "big_file_size": 0,
    "thumb_file_size": 0,
    "file_md5": "",
    "thumb_width": 0,
    "thumb_height": 0,
    "file_crc": 0
}