import base64
import json

node = {
    "local_address": "0.0.0.0",
    "local_port": 21180,
    "server": "121.14.152.149",
    "server_port": 10004,
    "method": "aes-256-cfb",
    "password": "dwz1GtF7",
    "mx_head_str": "com.win64.oppc.game.common:22021709,102024080020541279",
    "PluginName": None,
    "PluginOption": None,
    "ConfigType": 0,
}

formatted = f"MuXunProxy.exe --mx {base64.b64encode(json.dumps(node).encode(encoding='utf-8')).decode(encoding='utf-8').swapcase()} -u --no-delay --fast-open -zv"

print(formatted)

with open("output.txt", "wb") as F:
    F.write(formatted.encode(encoding="UTF-8"))