Extrinsic 162-1

{
  "heartbeat": {
    "blockNumber": 161,
    "sessionIndex": 2,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x02e2fce217afb73a909d4ca32b96082555562081bdaa1a1772cd860a6872b52f71a3461b6657574afebb093820c08ae185ca9e6309126d6b68d415595128ce80"
}