SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x000000000000000000000000000000000000000000000000000000000000000014624cb5adf8588e92f3446d3da20ce6f4e71a480620d8642127625fb3c740eac36e983c31d0290e1daa25d6b7a3f9741e67b8cce8b49c719d6e596eeaa611e7