SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000002aa86fe83a4c9cf0720fb6624e9aca5dadf1319cf8358547dae2a1feb44d4cd40e8174c462d72d8cae8078c6ee7b4c31ce0b5066066de6d4d951f17bc55b9e55e