Extrinsic 17259-1

{
  "heartbeat": {
    "blockNumber": 17258,
    "sessionIndex": 287,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xf49723b654c52cdb78dac186b805a59eb01c3c26cecee4642addbccd21e97f69c899c0f00b6a63f6bb2be73b082e07a7fd62c51e2545e17ff33a86df708c6e8e"
}