[LoadUIWeb] How to extract data from request dynamically

Yes I have gone through these documents, but none of my request show me parameter data under paramenter tab(rather its blank).. I need to extract this data only dynamicaly from request.  When i asked developer about this, they said data is sent to server using put method and you need to extract this.. the data may b sent as name pair value or in the form or array or array of an array.