Extrinsic 17486-2

{
  "heartbeat": {
    "blockNumber": 17485,
    "sessionIndex": 291,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xdaaf2b6a4f19ae5ddf8290eaf6481695f396a052dd6278683cdd0df971fe616fc54c42b1e4af9219e5884850533a47d285c312fefda1b49c2b9e6b22d855158b"
}