Extrinsic 17310-1

{
  "heartbeat": {
    "blockNumber": 17309,
    "sessionIndex": 288,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x825ab255a03eb99105663d8c1327583e946197e5987f59cd887931123c4fee32570d6b6b5f71432d0e78164d023f256d9637cdb5b3b3dc9584c02e19cc0e0b8a"
}