Extrinsic 43268-1

{
  "heartbeat": {
    "blockNumber": 43267,
    "sessionIndex": 721,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x9837bcc7fc81e6952c1164b01ea94055b6a42fa783822634365acd091b701d5592cfaeeff42636f691b6700dfb3bcd980e7c6bba6aad928f04c17b4167480a88"
}