idoc types/BAPI to be used to integrating with SolMan ITSM

Dear all,

can you please suggest what Idoc types and BAPIs I can use to be able to create/update incident in SolMan from External system? I need bidirectional communication. So as ext system triggers the incident create/update in SolMan also any updates in SolMan's incident triggers message to external system.

Thanks,

m./