SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000001f1a60f3a98e0270db935e85a24a39de1e08c0fab349b0685bdca8c66684817ec47d53884202733a57c534b1cb94ab4b5b344c7315f7def0d29596c1a6f675137