Custom Human Task

Issue

Is it possible to create custom human task? Similarly as it is possible to create custom Work Item which behaves like service task?

The initial thought was to alter Work Item Definition like this:

import org.drools.core.process.core.datatype.impl.type.StringDataType;
[
  [
    "parameters" : [ 
        "AccountBO.Person.firstName": new StringDataType(), 
        "AccountBO.Person.lasttName" : new StringDataType(), 
        "AccountBO.Person.middleName" : new StringDataType() 
    ], 
    "results" : [ 
        "CIF_ID" : new StringDataType(), 
    ], 
    "displayName" : "AccountCreate", 
    "icon" : "defaultservicenodeicon.png" ,
  **  "name" : "User Task"**
  ]
]

So the default Human Task which is in Designer would be replaced by this one, but the task variables are not correctly configured.