[Python] Insert data into quip standalone spreadsheet via quip api

I googled to find a solution for this but unfortunately no luck. I am want to insert a value in A1 cell number of my first sheet, my spreadsheet is standalone, when i run this code it shows in the online quip update that just something updated, but inside the file it is blank showing nothing, can you pls check what i am missing here.

import requests
ACCESS_TOKEN = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
THREAD_ID = 'xxxxxxxxxxxxxxx'
url = 'https://platform.quip-corpxx.com/1/threads/edit-document'
headers = {
'Authorization': f'Bearer {ACCESS_TOKEN}',
}
data = {
'thread_id': THREAD_ID,
'content': 'serialnumber',
'location': 'A1'
}
response = requests.post(url, headers=headers, data=data)
print(response.status_code)
print(response.json())

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