Extrinsic 9276-1

{
  "heartbeat": {
    "blockNumber": 9275,
    "sessionIndex": 154,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x1a12be7c1a44441c5290839c40b7e273a6a9e9b1e5ee371a5a3ba789aeab5f7931066ce2e23c3296f5693e97479c7dfc780a2a09bd10292ce0d82dd10835a988"
}