Update an employee using web service

Dear All,

Can I update the employee assignment using this URL:

https://<Application_domain>/hcmRestApi/resources/11.13.18.05/workers/{workersUniqID}

and JSON body something like this:

{

  "workRelationships": [

    {

      "assignments": [

        {

          "ActionCode": "ASG_CHANGE",

          "GradeCode": null

        }

      ]

    }

  ]

}

Or is it obligatory to use this URL:

https://<domain_application>/hcmRestApi/resources/11.13.18.05/workers/{workersUniqID}/child/workRelationships/{PeriodOfServiceId}/child/assignments/{assignmentsUniqID}

Thank you in advance.