SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000c2c5b84ac188464d1e97831288be161396f188e59f1b33607b4267ee4340102b8d1b89ffa6941ddfa21c2aa71390a8cadd24ec652c9b1894482920b1be1c1c7c