def METHOD_NAME(self) -> TYPE_RESPONSE:
    arn = self._get_param("executionArn")
    execution = self.stepfunction_backend.METHOD_NAME(arn)
    response = {
        "executionArn": arn,
        "input": execution.execution_input,
        "name": execution.name,
        "startDate": execution.start_date,
        "stateMachineArn": execution.state_machine_arn,
        "status": execution.status,
        "stopDate": execution.stop_date,
    }
    return 200, {}, json.dumps(response)