Generic interface

I'm creating a Web-Service WCF that will expose methods to do CRUD operations in a database. And I have doubts on how to create the contract interface. The Service will allow CRUD in multiple tables and will involve many complex types like Client , Address , Dependent , Functionary , etc. I created the contract interface called IDataPersistance and for now it looks like this:

[ServiceContract]
public interface IDataPersistance
{
    [OperationContract]
    bool Insert ( object value );

    [OperationContract]
    bool Change ( object value );

    [OperationContract]
    bool Delete ( object value );

    // TODO: Adicione suas operações de serviço aqui
}

The problem is that to insert a Client method Insert should receive a Client object, to enter a Address the Insert method should receive a object Address , and so on. The same also happens as Delete method. In some cases (such as to delete a Address ) it receives a string as a parameter and in other cases a int . I'm weighing in how I could create an interface (generic?) That would serve as a contract for CRUD operations involving any type.

Or in this case I can not get away and I have to create a CRUD interface for each object that will be persisted in the bank? That is, an interface for Customers CRUD, another for Dependents CRUD, etc. ?