Extrinsic 3155-1

{
  "heartbeat": {
    "blockNumber": 3154,
    "sessionIndex": 52,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x68d0043a70d0cf227ddd3dd44ded7f477c49f0201f801a2ed3438ef7a8f9ed73b6f5c422633c37c8177c9540162be3ee1c2e28388bdb4da4d34caaba4baada8b"
}