SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000003c542e16d43cfa0ec7d50202b53e33930a4e6cc42f64f1e1cf5de04e26a7ed0fef886f817ddbbe8c1b6ff959c17f552fe4f185cd5616bb6d095bb9f344ae7eb5