Extrinsic 40489-1

{
  "heartbeat": {
    "blockNumber": 40487,
    "sessionIndex": 674,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x70eaa4dec9f631af66c7e631bd779f1341630819e7d6e146485a8edf56f5b00db491bfb19d649b08f6983cf0d79add64663e7f4dea992aed035b3fc464e69f89"
}