Extrinsic 57438-1

{
  "heartbeat": {
    "blockNumber": 57437,
    "sessionIndex": 957,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0641b3d73ef56b96ca008f15508e41369d54c63bc6c3e7b7e6b5a8f63702041bec731393e78318a423bbd1ffb6e4aebe9ea365c8725fd1ea2b403e732b885b8d"
}