SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000002d30ae7f7ab1c1b649bd007e4954643b634c588173eac1642b74fc46a7dd85361f1812852d3a5a7dbe3b94b1f7b2c0e2bee901484a12a511112abdd05127e3fc