### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When starting the transcription job in response job object is null:

<img width="1154" alt="Screenshot 2023-04-03 at 09 21 09" src="https://user-images.githubusercontent.com/454412/229447066-1671f811-da49-478d-bf24-252f30b17699.png">


### Expected Behavior

Response from the real AWS stack - job object is not null

<img width="1161" alt="Screenshot 2023-04-03 at 09 30 13" src="https://user-images.githubusercontent.com/454412/229441498-06125248-3b68-4679-8204-0163e8245db6.png">


### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

Using test containers, reproducing project can be found here:

https://github.com/kkocel/local-stack-transcribe-repro

### Environment

```markdown
- OS: macOS
- LocalStack: latest
```


### Anything else?

_No response_
"minDelayTarget": 1,
                "maxDelayTarget": 1,
                "numRetries": 0,
                "numNoDelayRetries": 0,
                "numMinDelayRetries": 0,
                "numMaxDelayRetries": 0,
                "backoffFunction": "linear",
            },
            "sicklyRetryPolicy": None,
            "throttlePolicy": {"maxReceivesPerSecond": 1000},
            "guaranteed": False,
        }
        sns_client.set_subscription_attributes(
            SubscriptionArn=subscription_arn,
            AttributeName="DeliveryPolicy",
            AttributeValue=json.dumps(delivery_policy),
        )
        if raw_message_delivery:
            sns_client.set_subscription_attributes(
                SubscriptionArn=subscription_arn,
                AttributeName="RawMessageDelivery",
                AttributeValue="true",
            )
        return topic_arn, subscription_arn, endpoint_url, server
    yield _create_http_endpoint
    for http_server in http_servers:
        if http_server.is_running():
            http_server.stop()
@pytest.fixture
def route53_hosted_zone(route53_client):