apiKey = YOUR_API_PUBLIC_KEY
apiSecret = YOUR_API_SECRET
apiSecret = base64.b64decode(apiSecret)
stamp = str(int(time.time())*1000)
data = "{}{}".format(apiKey, stamp).encode('utf-8')
signature = hmac.new(apiSecret, data, hashlib.sha256).digest()
signature = base64.b64encode(signature)
"X-Signature": str(base64.b64encode(signature).decode('utf-8')),
"Content-Type: application/json"