Extrinsic 44239-1

{
  "heartbeat": {
    "blockNumber": 44237,
    "sessionIndex": 737,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb4f9691f02aa83684bdc39a2f22edddd9912ec6232cb115ad4cf3aa2d0bb80600ebc89bf78f4ca2fedf34625cd9397515ef12520c481288211245c12cf0d678e"
}