Extrinsic 54547-1

{
  "heartbeat": {
    "blockNumber": 54546,
    "sessionIndex": 909,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8400fa73188a8b047805551c6fac1fc8e1f611ecd3a41067b5b889eff2a04c0d88a125f578ca0dcc3b26f2bdd0830c85d4fae1b2648e5d26e9aa576cd3ad8185"
}