Extrinsic 17486-1

{
  "heartbeat": {
    "blockNumber": 17485,
    "sessionIndex": 291,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x3aa76c99c51482e906f5e16a68c96b593d660009d11f0d528edf3779dc231e2d1cbfc3a7fa33a1c52cbf48fbb5d19e3126c3e2c267887261d1dd26ac3b567d8a"
}