Extrinsic 12996-1

{
  "heartbeat": {
    "blockNumber": 12995,
    "sessionIndex": 216,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x7ece70b6c6bfe222d77d53efbeb05add31c460b6ca2b1f2a539c7e6c2d3d3d671ab520ec96b4048d71787b774b1cc2e25c467f5d0d9629f6375e5f2d940cf588"
}