Marks the start of a command.
<Type> JOURNCOM </Type> ⋮ <RecType> EVENTSTART </RecType>
<ES_EventType> ONLINEEDIT | MIGRATE | BACKOUT | INSTALL </ES_EventType>
<ES_System> SMF_system_identifier </ES_System>
<ES_JobName> job_name </ES_JobName>
<ES_JobID> job_ID </ES_JobID>
<ES_TaskNum> CICS_task_number </ES_TaskNum>