Extrinsic 88660-1

{
  "heartbeat": {
    "blockNumber": 88659,
    "sessionIndex": 1477,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x52f02eff48589550b59492e73a4e13118207e5b8eb5969355aec85a08518984c347c1b0c7bd47d56dc9414d3b0a434f81605d67db64f68e0f03c2ae1789c1480"
}