Extrinsic 43591-2

{
  "heartbeat": {
    "blockNumber": 43590,
    "sessionIndex": 726,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x3e2f21c29a377e8c2e0d89a3e5c30e228a3a006757b00c20b3ddef2b9ed1805f83379e2a0b8ba2769f72f8bf39793fa6f31d56f41ec9b54dcfa3b5b7f4e17982"
}