Extrinsic 43275-1

{
  "heartbeat": {
    "blockNumber": 43274,
    "sessionIndex": 721,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xfc48ba310110fec8132553c4e5097c77c5aa331aabb2b2ae6e3856ef110ef15480c411dcf33a8ecf23987c85cbde02a9646e2f3ceef9d893ff22cbc09a4b548e"
}