Extrinsic 3158-1

{
  "heartbeat": {
    "blockNumber": 3156,
    "sessionIndex": 52,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xa82ff863b7223474fe7146536b0885ef4e6ace0bee98352d29761853e23b51652e863b8bc96fea104aaf8e250c1a0446bf4c6f74ec9c5be8c6247f152962288a"
}