https://userapps.support.sap.com/sap/support/knowledge/en/3486800
3486800 - Manual upload of PPI data is not supported in SAP Signavio Process Insights | SAP...
You would like to download manually PPI data from ERP or S/4HANA system and upload it into SAP Signavio Process Insights, without connecting the ERP or S/4HANA...