Extrinsic 177673-1

{
  "heartbeat": {
    "blockNumber": 177670,
    "sessionIndex": 2961,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x0a541cd3bbf5b58737274192d0cb1759a5eb303b36748f8d832573c579746c7d4863b52e83a43e69d3d191eec80e83717be5fcd5c3e1a681aea85b9e77baf389"
}