[Python] BOTO3 - S3 - generate_presigned_url for `put_object` returns `SignatureDoesNotMatch`

I am trying to create a presigned URL to upload a JSON object, but when I try to upload an object with this URL, it is denied with a SignatureDoesNotMatch error code.

def get_put_presigned_url():
s3_client = boto3.client('s3')
response = s3_client.generate_presigned_url(
ClientMethod = 'put_object',
Params = {
'Bucket': "my-bucket",
'Key': "test.json",
'ContentType': 'application/json'
},
ExpiresIn = 3600,
HttpMethod = 'PUT'
)
return response


If I change the method to get_object, the url works, so I am wondering if I need other settings for PUT requests. I tried adding more params like ContentType and HttMethod but it didn't change the error.

I tried looking at other similar issues like BOTO3 - generate_presigned_url for `put_object` return `The request signature we calculated does not match the signature you provided`, but couldn't find one that fix the issue.

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