SoftSale POST Request for Installation Error

Hello..
Ive tried a lot to send data in different types, I am totally lost.
Here is my code:

Code:

import requests, json, uuid
url = "http://domain.net/amember/softsale/api/activate"
key = 'LNGJZHSJLRF4RD68K5'
hardwareid = uuid.getnode()

#params = {"key" : key, "hardware-id" : hardwareid }
params = {'key' : key, 'request' : ('hardware-id',  hardwareid) }
#params = [('hardware-id', hardwareid), ('key', key)]

r = requests.post(url, data=params)
print(r.text)

But I keep getting this error:
{"message":"Required activation parameter [hardware-id] not passed","code":"invalid_input","next_check":120}

Can someone help me achieve passing hardware-id correctly? Thanks.