Extrinsic 157309-1

{
  "heartbeat": {
    "blockNumber": 157307,
    "sessionIndex": 2621,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x423d338989ff29a10847fd5690f67c5871449c8b0cc3e579e4b5927571c16854a648bba4788583c5cab3253fefda6ea8209cba89b3d00319db59e5c64b202c85"
}