import requests

url = "https://api.13-215-85-171.sslip.io/v1/sandboxes/{id}/desktop/screenshot/region"

payload = {
    "x": 123,
    "y": 123,
    "width": 123,
    "height": 123
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

"<string>"