First you would need to create a Service (ex:UpdateEditedTable) with the input of type infotable" that would correspond to the datashape of your Grid. An easy way would be to run a service that gets all records from the infotable in the composer using "Test" button and "Create Datashape from Executed result"; then add the datashape to the UpdateEditedTable service. Then, in the mashup, you'll bind the EditedTable parameter from your Grid to the UpdateEditedTable service.
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