How to parse JSON from an incoming request?

Question

Django

1C sends a POST request. With JSON data in the request body.
How do I count them in Django?
Tried like this

@csrf_exempt
def data_fill(request):
    try:
        data = json.loads(request.body.decode("utf-8-sig"))  # Загрузка JSON
    except ValueError:
        return HttpResponse("invalid json")

An error is thrown.
django.http.request.RawPostDataException: You cannot access body after reading from request's data stream
Of course, I googled, Google refers to problems with CSRF, but it seems to have written @csrf_exempt before the view.