Is good practise to send stored procedure input parameter as List KeyValuePair in WCF service?

using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace RestService
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IRestfulService" in both code and config file together.
    [ServiceContract]
    public interface IRestfulService
    {
        [OperationContract]
        [WebInvoke(Method = "post", ResponseFormat = WebMessageFormat.Xml, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "xml/{dbType}/{Query}/{Param}/{bSP}")]
        String XMLData(int dbType, string strQuery, List<KeyValuePair<string, object>> kvParam, bool bSP);

        [OperationContract]
        [WebInvoke(Method = "post", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "json/{dbType}/{Query}/{Param}/{bSP}")]
        String JSonData(int dbType, string strQuery, List<KeyValuePair<string, object>> kvParam, bool bSP);
    }
}