SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000002265072157c0241fc6c1705b6e0e73702c2199df96a867920e461bbfd9a309e4c5f9930453252519d13e3ed1970ed9f73ab3d319c51e664a893ac15f5bc31d180