Extrinsic 55899-1

{
  "heartbeat": {
    "blockNumber": 55897,
    "sessionIndex": 931,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x4aa9b19f14c07fbb868a367f88894d063d4c50d5d23464177b6d52b2089d1d467c830dba5273498ae1cf39fc1706ca8527fe841bcb5f82c32a27c0326ecf3d86"
}