Extrinsic 16607-1

{
  "heartbeat": {
    "blockNumber": 16605,
    "sessionIndex": 276,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x601916db7fe593dc0e77154c979a84b8e42f523b07eb72eebf19cb5a64364e2604626e2b7291475c947beadca25517e546a03e716b82c872b1b47f9df3a92b89"
}