SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000001f2c31a6f5fd665fd094da7ab00737a2e77340f8413c783c7e5cca6bc626e0e34dd7404ce8f3521cc6e3dfd35363ee6821f479f822480c758fa43c6f45e910bc5