Extrinsic 27450-1

{
  "heartbeat": {
    "blockNumber": 27448,
    "sessionIndex": 457,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x08207e952bf242ebc178bf0b1d5af72c46654f818841f77148a95d784a6bc57971074860ab7407834e68545cae3c568ca92b73cd8118e8b55b10d6ac5b2c4282"
}