Error when decoding JSON ( Expecting ',' delimiter:)

[stranac]

Python is definitely able to parse it:

>>> json.loads('''{
... "cookieId": "1548768911871854",
... "firstVisit": 0,
... "customerExtId": null,
... "channelName": "www",
... "referrer": null,
... "actionMcType": null,
... "offerType": null,
... "actionOnProduct": null,
... "pageTitle": "page title",
... "pageDesc": "page description",
... "pageKeywords": "page kw"
... }''')
{'cookieId': '1548768911871854', 'firstVisit': 0, 'customerExtId': None, 'channelName': 'www', 'referrer': None, 'action
McType': None, 'offerType': None, 'actionOnProduct': None, 'pageTitle': 'page title', 'pageDesc': 'page description', 'p
ageKeywords': 'page kw'}

It looks like you're misdiagnosing the problem.
If you can share code which recreates the error, we might be able to help.