Create Bug API - Input Paramenter Missing

Create Bug API - Input Paramenter Missing

Hi there,

I'm trying to create a bug passing the following JSON -
{
                    authtoken     : authtoken,   
                    title              : 'Test bug #1',
                    description    : 'Test bug example one'
 }

however it is returning {"error":{"code":6831,"message":"Input Parameter Missing"}}

any thoughts?