POST http://localhost:8080/cmx/bulk/localhost-orcl-DS_UI1

{
  "systemName":"Product",
  "rootRowId":"165",
  "items":[
    {
      "operation":"createRelationship",
      "relationship":"ProductGroupIsParentOfProductGroup",
      "payload":{
        "from":{
          "rowidObject":"165"
        },
        "to":{
          "rowidObject":"166"
        }
      }
    },
    {
      "operation":"createRelationship",
      "relationship":"ProductGroupIsParentOfProductGroup",
      "payload":{
        "from":{
          "rowidObject":"166"
        },
        "to":{
          "rowidObject":"167"
        }
      }
    },
    {
      "operation":"createRelationship",
      "relationship":"ProductGroupIsParentOfProduct",
      "payload":{
        "from":{
          "rowidObject":"167"
        },
        "to":{
          "rowidObject":"168"
        }
      },
      "effectivePeriod":{
        "startDate":"2019-01-01T11:11:53.974-04:00",
        "endDate":"2039-12-31T11:11:53.974-04:00"
      }
    }
  ]
}