[
                "leftOperand": [
                  "leftOperand": [
                    "leftOperand": "attachmentdatafiledesc",
                    "operator": 'LIKE',
                    "rightOperand": '%' + currFilter.value + '%'
                  ],
                  "operator": 'OR',
                  "rightOperand": [
                    "leftOperand": "procedurecode",
                    "operator": 'LIKE',
                    "rightOperand": '%' + currFilter.value + '%'
                  ]
                ]
                ,
                "operator": 'OR',
                "rightOperand": [
                  "leftOperand": [
                    "leftOperand": 'signaturerequestname',
                    "operator": 'LIKE',
                    "rightOperand": '%' + currFilter.value + '%'
                  ],
                  "operator": 'OR',
                  "rightOperand": [
                    "leftOperand": 'documentmastertypedesc',
                    "operator": 'LIKE',
                    "rightOperand": '%' + currFilter.value + '%'
                  ]
                ]
              ]