SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000f79c596bc922ae2287aecd61a6973ab75aaf9a13cd74e6f2ae951b704173567c2fde5114fe0a6f9f985bd848e53c7b0acbf41cd2b79df7c3cbee2965feacff75