{
  "blind_signature": "57744b5430075756d246ceff94f47e9ffeb80af3d8f79b2c7c3c4a113d1cdc9d37e9745e98b8f4eaecbbd43c44109c47bdfbb6190a349d3179d55c777629319",
  "reference": "a0",
  "type": "blind signature"
}