import requests
import json

url = "https://partner.someurl.com/api/v1/orders/detail"
header = {"Content-Type": "application/json", "Content-Length": "98", "Authorization":"8be8e0cd1437723b4b4b3f50326e7ce8a3e5583fb4cd79eeebfcfc348fb9757"}

payload = {"ordersn_list":["18111612379RDDP"],"partner_id":22222,"shopid":34311,"timestamp":1542483120}

r = requests.post(url, json=payload, headers=header)
print (r.text)
print (r.status_code, r.reason)

print (r.headers)