Extrinsic 3075-1

{
  "heartbeat": {
    "blockNumber": 3074,
    "sessionIndex": 51,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf6535529cfaf8f546028baeb1bfbba024207fac1a770bf68c61d6b47cd184d26d5c74db82d81a933765751df1e9476cc8a688925ee3fe1b462d7416d8b2a8f84"
}