Editing page in confluence with requests throws status code 400 error

[frank yify]

The code I run is as mentioned below (Few information has been changed into dummy words for company confidentiality)

I need to write a page with multiple tables 

import requests
import json

user = 'dummy1'
password = 'dummy6'

page_title = 'Defect_density'
page_html = '<h2>This is test</h2>'
space_id = 49584054
page_id = 3045830530
space_key = 'Eleven'
url = 'https://<company>/confluence/rest/api/content/{}'.format(page_id)


headers = {
'Accept': 'application/json',
'Content-Type': 'application/json'
}

payload = {
'id': '{}'.format(page_id),
'type': 'page',
'title': '{}'.format(page_title),
'space': {"id": '{}', "key": "{}".format(space_id, space_key)},
'body': {'storage': {'representation': 'storage', 'value': '{}'.format(page_html)}},
'version': {'number': '3', 'minorEdit': False}}

try:
r = requests.put(url=url, data=json.dumps(payload), auth=(user, password), headers=headers)

if not r.status_code != 200:
print(r.content)
print("Error: Unexpected response {}".format(r))
else:
print(r.content)
print('Task ended')

except requests.exceptions.RequestException as e:
print("Error: {}".format(e))

Out put goes like this :

b'{"statusCode":400,"message":"Can not construct instance of java.lang.Long from String value \'[N/A]\': not a valid Long value\\n at [Source: com.atlassian.confluence.plugins.restapi.filters.LimitingRequestFilter$1@4b0db414; line: 1, column: 257] (through reference chain: com.atlassian.confluence.api.model.content.Content[\\"space\\"]->com.atlassian.confluence.api.model.content.Space[\\"id\\"])","reason":"Bad Request"}'

Need assistance to fix the failure