SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000002a1082ff5b55cd9d5793110807f1736f8e91841528f5f73010b2aa57d63b031746094e5efd242dcb948480c95a21371677c91a9dbdb382f0b7ba5909f17336204