Extrinsic 26970-1

{
  "heartbeat": {
    "blockNumber": 26968,
    "sessionIndex": 449,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x0c6799735b9c8cb077220e094c013d48e02c372e5c71fd89f8220d3be0100329605123c9ea4829fdb429b6919f19aba2aedaefc983a6eb5e234f33a6a93ebb86"
}