Extrinsic 21760-1

{
  "heartbeat": {
    "blockNumber": 21758,
    "sessionIndex": 362,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xfc49b5ddf069b5f1c49a71f84d3b78e0f81f5f8e27360d676078e4fce514f632d75a2a84cb332f929d6156832817a935abaf6c0a6ba7150b5e3c68ec25c31686"
}