Extrinsic 19293-1

{
  "heartbeat": {
    "blockNumber": 19291,
    "sessionIndex": 321,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x48615cd014a8d302eb7b37f423dc9b97c477e19d2b69e86bd2cd0283f74d562e85449a48cb58e686749cb40f7b2d048f9bf532dee2bf3f519f2955c86f022c8a"
}