<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_instance(self, payload):
 """ Build an instance of ExecutionStepInstance :param dict payload: Payload response from the API :returns: twilio.rest.studio.v1.flow.execution.execution_step.ExecutionStepInstance :rtype: twilio.rest.studio.v1.flow.execution.execution_step.ExecutionStepInstance """

        return ExecutionStepInstance(
            self._version,
            payload,
            flow_sid=self._solution['flow_sid'],
            execution_sid=self._solution['execution_sid'],
        )