Extrinsic 19887-1

{
  "heartbeat": {
    "blockNumber": 19886,
    "sessionIndex": 331,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x7eb2335c58c5da0d42d5a51ea332affe251fd95fed174180e24a7a339f1e5c6438cc8d83673cd712e6fc3f5b6e688475e9423e132a21093359d4e87d8ad30c89"
}