Extrinsic 944-1

{
  "heartbeat": {
    "blockNumber": 943,
    "sessionIndex": 15,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xc42709903ff81bc9fdef2bdc41c424ae12de0df4bd9629791aaefea1897eb8234e50ee9b65c9e3466b7013504d661203f30ed1b41d57a5758c3bb3181feddb84"
}