SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000001177a5aa1b5b9440fd07f107b89f753c722f8ef0cf0e1aba9f6c9baa57375ab8e1667ffd95bb59301e67a3a1e8cd2e855a78fc15309a8d37f02dbf0d24651830a