Extrinsic 4103-1

{
  "heartbeat": {
    "blockNumber": 4102,
    "sessionIndex": 68,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7488ae10d2771ed91954c712de63f60ca9946c9294535be62c53338cd38b326e69e3f64d5e4c7cdfa79f1a32637a370ba683391ba39163f541eaf47228064285"
}