Need a little assistance in using php to access blob data sent from javascript post. Here is the method I used to attach blob to formdata -

var formData = new FormData();
formData.append('jsonData', 
                new Blob([JSON.stringify(
                    {"action":"readString", 
                    "details":{"string":"string1"}
                    })
                ],
                {type:'application/json'})
            );

Previously I only used $_POST method, but I am having no luck when sending file as blob.

Also, is it necessary to include "{type:'application/json'}" object. I saw other examples of sending blob via post and did not see this additional object included.