Extrinsic 17924-1

{
  "heartbeat": {
    "blockNumber": 17922,
    "sessionIndex": 298,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x348086c4ce6e0111b398eafe136f8b0e15b11e721b299255ccd82c33ef774c36e27af7c52bcb37f02a0d5796a9d4b4d82a3000efffb52b437fe51296ebda2d8d"
}