Extrinsic 26979-1

{
  "heartbeat": {
    "blockNumber": 26977,
    "sessionIndex": 449,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x04671bccf52e733ebc20e706190d9750b473fe23a340986b1268a60703ed363fcfec9e80b5b1dbd297826226338cd1bcb7fa3c9f57d9fd1c503a98c85a8d498e"
}