API in python Error 400 "invalid input parameters" - how to fix - python-3.x

Question

I am programming an API in python to query a server if it has endpoint agents in it. The server and the endpoint belong to Apex central SaaS trend micro.
The error I get is that I'm putting the wrong parameters but I don't think the problem is there.
The code I have for the query is as follows:
import base64
import jwt
import hashlib
import requests
import time
import json
import urllib.parse
def create_checksum(http_method, raw_url, headers, request_body):
string_to_hash = http_method.upper() + '|' + raw_url.lower() + '|' + headers + '|' + request_body
base64_string = base64.b64encode(hashlib.sha256(str.encode(string_to_hash)).digest()).decode('utf-8')
return base64_string
def create_jwt_token(appication_id, api_key, http_method, raw_url, headers, request_body,
iat=time.time(), algorithm='HS256', version='V1'):
payload = {'appid': appication_id,
'iat': iat,
'version': version,
'checksum': create_checksum(http_method, raw_url, headers, request_body)}
token = jwt.encode(payload, api_key, algorithm=algorithm)
return token
# Use this region to setup the call info of the Apex Central server (server url, application id, api key)
# server info
use_url_base = 'https://arct3w.manage.trendmicro.com'
use_application_id = '52EB0005-B6DA-4249-9764-62AE3BFCDBB1'
use_api_key = 'B3FE1D91-5D05-490C-B45C-26A9EFF6C363'
productAgentAPIPath = '/WebApp/API/AgentResource/ProductAgents'
canonicalRequestHeaders = ''
useQueryString=''
payload = {
'computerId':'e34a13a1-1d0f-47bc-96e0-ae4db4288940'
}
useRequestBody = json.dumps(payload)
jwt_token = create_jwt_token(use_application_id, use_api_key, 'POST',
productAgentAPIPath + useQueryString,
canonicalRequestHeaders, useRequestBody, iat=time.time())
headers = {'Authorization': 'Bearer ' + jwt_token , 'Content-Type': 'application/json;charset=utf-8'}
#Choose by call type.
r = requests.post(use_url_base + productAgentAPIPath + useQueryString, data=useRequestBody, headers=headers, verify=False)
print(r.status_code)
if 'application/json' in r.headers.get('Content-Type', '') and len(r.content):
print(json.dumps(r.json(), indent=4))
else:
print(r.text)
I tried to do something similar to an api belonging to Vision One but it didn't work:
https://automation.trendmicro.com/xdr/api-v2#tag/Search/paths/~1v2.0~1xdr~1eiqs~1query~1endpointInfo/post
the original code of the query is :
https://automation.trendmicro.com/apex-central/api#tag/Security-Agents/operation/AgentResource_GetProductAgentsV2