Extrinsic 16784-1

{
  "heartbeat": {
    "blockNumber": 16782,
    "sessionIndex": 279,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x14d3778cb0ee799f3ffe22814f150764c23b9cec77a86609204dbf315973cd477f4b9d47372b16ae09eb67d2c985d90e303368688dfd326bde8a836911c6098c"
}