Extrinsic 55575-1

{
  "heartbeat": {
    "blockNumber": 55573,
    "sessionIndex": 926,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xd2cc9409c01dc2d39912c2f9370ee6856263d70395691aa90e7b0acd234d1a56515c27b6b86d15819e594c7b5728be725f26840df545773f6bdd0358c725e186"
}