Extrinsic 7762-1

{
  "heartbeat": {
    "blockNumber": 7760,
    "sessionIndex": 129,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x6c304c5b25c9f66d602b76e2ca9ce39103de0b001ff52405b17b19bcfb74ee37b84ed1cdf8c3500cf5eac220260ac2821cc49c785f8c9ca4781e7dbfad719a8d"
}