You can try the follows, I've changed the data to JSON format:
function EditProduct(action, dealID, dealWorkFlowID) {
debugger;
$.ajax({
url: '/Deal/GetInfo/',
type: 'GET',
dataType: 'json',
data: { id : dealID},
success: function (data) {
PopulateDealWorkflowDepositsTable(data, 'tableDepositDealEditProduct', true, -1, -1);
},
error: function (x, y, z) {
alertify.error(genericErrorMessage);
$('#loaderSelectProducts').css('display', 'none');
}
});
}