Extrinsic 27750-1

{
  "heartbeat": {
    "blockNumber": 27749,
    "sessionIndex": 462,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xcc493b148f23eca9635c72fdc3d9740739c5ad660c1f46c301232952b53ce26ebf2b0ac15565788ea15fd718b6ba7605840e3f9ee0cdf918429a7ff0e0d17889"
}