SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000005093c1f9ce5a11cf9d9ee3deb360e0515403f449969d3c74abd484a5d72a75dd49c8c6f6f3b0e1a9ed674a310e746317a1c960fe8ea8c6e73f408993de3b916b