Hello SAP Experts.
I've got trouble with adding custom attribute to campaign header using Open Channel (3) - Define Global Settings for Execution enhancement
I followed advice given in the answer here -> Open Channel Integration - How to add custom attributes to the payload? | SAP Community. Also added an implementation ID to the filter but it didn't work out anyway. Payload in CPI has only standard attributes.

Do you have any suggestions about why it doesn't work?
Thanks for help!