Put Request Like PostMan , How to do it ?

Hello , I am trying to use Put Method like Postman , But I can't Figure out the problem I was looking everywhere , and they always use in string parameter rawdata and what is rawdata content ? I don't know Here is my use in Postman and here is my try in unity So Help please , Thanks

PostMan

Here is my try in Unity

     IEnumerator PutRequest()
     {
         
         using (UnityWebRequest www = UnityWebRequest.Put("http://0000000/smallapi2/products?id=1", "{'name':Chipsy,'product_price':12,'productPurchasedCounter':142}"))
         { 
             www.SetRequestHeader("Content-Type", "application/json");
             www.SetRequestHeader("Accept", "text/json");
             yield return www.SendWebRequest();
             try
             {
                 if (www.isNetworkError)
                 {
                     Debug.Log("PUT ERROR: " + www.error);
                 }
                 else
                 {
 
                     Debug.Log(www.uploadHandler);
                     Debug.Log("Uploaded!!");
                 }
             }
             catch (Exception)
             {
 
                 Debug.Log("NO QORY");
             }
 
         }
     }