### 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_
return aws_client.firehose
@pytest.fixture(scope="class")
def cloudwatch_client(aws_client):
    return aws_client.cloudwatch
@pytest.fixture(scope="class")
def sts_client(aws_client):
    return aws_client.sts
@pytest.fixture(scope="class")
def ec2_client(aws_client):
    return aws_client.ec2
@pytest.fixture(scope="class")
def rg_client(aws_client):
    return aws_client.resource_groups
@pytest.fixture(scope="class")
def rgsa_client(aws_client):
    return aws_client.resourcegroupstaggingapi
@pytest.fixture(scope="class")
def route53_client(aws_client):
    return aws_client.route53
@pytest.fixture(scope="class")
def route53resolver_client(aws_client):
    return aws_client.route53resolver
@pytest.fixture(scope="class")
def transcribe_client(aws_client):
    return aws_client.transcribe
@pytest.fixture(scope="class")
def ecr_client(aws_client):
    return aws_client.ecr
@pytest.fixture
def dynamodb_wait_for_table_active(dynamodb_client):