Extrinsic 19489-2

{
  "heartbeat": {
    "blockNumber": 19487,
    "sessionIndex": 324,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x9cd79afedd9728e984a6f9071910b2a8259a343aa99246cb19778341b99ce74415706ab65987c314155087f361ff72d0c7ac8c38c34e1e59f616f9be2d42a98a"
}