Importing data from different sources and merge into one

We are fetching data from different ERP sources and creating the same entities in our system. Every ERP system has different properties, I convert all these entities into a single general entity. I want to write a service that will receive data from all these different sources and convert their data into a single entity based on their type, either from oracle or syspro or sage. I think the decorator design pattern will be perfect to overcome this issue. what you say