structuredAttrs is enabled

trying https://static.crates.io/crates/tracing-samply/0.1.5/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100  94735 100  94735   0      0  1.92M      0                              0