Extrinsic 100303-1

{
  "heartbeat": {
    "blockNumber": 100302,
    "sessionIndex": 1671,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x748bc7451f99737c0dfc35a3b7d4c9ab335c620d551625b5d933d5176d99384f2c5452354a3e3df4ca178b9abe04ca3f9c810cc29035d5ce1490f8375ed2688d"
}