json.decoder.JSONDecodeError: Invalid \escape error

I am trying to parse unicode string in python and run into Invalid \escape error. I have seen this post, but it didn't help either.

Here's my code:

def replace_with_byte(match):
    return chr(int(match.group(0)[1:], 8))

def test(request):
    params = RequestLog.objects.get(id = request_id).params
    params = params[2:len(params)-1]
    invalid_escape = re.compile(r'\\[0-7]{1,3}')
    params = invalid_escape.sub(replace_with_byte, params)
    params = json.loads(params) # The error rises here
    # ...

And here's the value of params:

[{"display_name":"My calendar","owner_account":"My calendar","client_id":"1","name":"My calendar"},{"display_name":"[email protected]","owner_account":"[email protected]","client_id":"2","color":"15","name":"[email protected]"},{"display_name":"Contacts","owner_account":"#[email protected]","client_id":"3","color":"9","name":"Contacts"},{"display_name":"Holidays in Armenia","owner_account":"en.am#[email protected]","client_id":"4","color":"17","name":"Holidays in Armenia"},{"display_name":"\xd0\x9f\xd1\x80\xd0\xb0\xd0\xb7\xd0\xb4\xd0\xbd\xd0\xb8\xd0\xba\xd0\xb8 \xd0\xa0\xd0\xa4","owner_account":"ru.russian#[email protected]","client_id":"5","color":"12","name":"\xd0\x9f\xd1\x80\xd0\xb0\xd0\xb7\xd0\xb4\xd0\xbd\xd0\xb8\xd0\xba\xd0\xb8 \xd0\xa0\xd0\xa4"},{"display_name":"Test","owner_account":"[email protected]","client_id":"6","color":"18","name":"Test"},{"display_name":"[email protected]","owner_account":"[email protected]","client_id":"7"}]

The error message as is:

json.decoder.JSONDecodeError: Invalid \escape: line 1 column 563 (char 562)