sapleCreateRecord.Js

createRecord(event ){
            let newContact = {FirstName : 'Pikachu' ,LastName : 'Raichu'};

            createMyContact({con : newContact}).then((resp)=>{
                            this.recordId = resp.Id; //this will auto call wireMethod/


            });



        }

supporting apex

 @AuraEnabled
    public static contact createContact(Contact con){
        insert con;
        return con;

    }