Extrinsic 31904-1

{
  "heartbeat": {
    "blockNumber": 31903,
    "sessionIndex": 531,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x987d9ebe5d971417badff46aee5516d3a3e06b1b796b5f87b9994cec6ee9ee6e20c1b253d704f4d62e082d0fd61291ee1b12e764abe8cad91c94c675c9f03884"
}