SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000007448824639de40ab6526ddb93f5251781cb6629dd159ba50cc85309a1684a4c6da1e6522d89af11c39a44188b9741d80d13caa8c8466cd8dbe7239e31686ae7c