SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000002666cba088813f55e8aa0c1d402f80a0dabf1f76447aafba2131ee09ab08390041406806241e4c66d866e1a52c5f7c13f910670be48c441927c9256b44639c16