How to configure advanced grid search?

Hello, 

I have a service that return an infotable called allCenters,, i created other service called searchCenters that calls allCenters service and created a input in it: 

When i execute i try to execute the service, what the value i give in the query parameter i have the following error:

Any idea what i could i have missed y not well configured?

Regards, 

Yous