Extrinsic 3334-1

{
  "heartbeat": {
    "blockNumber": 3332,
    "sessionIndex": 55,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xf096e13b2fc7c5cf5fd22c52a54cbb0be46c1054a3ee9974eb0fa7849dc2143c19e6a2fab0022cdf33e7e64195b6cccba348e27781b8ecaa46eeaf6d5f3c658b"
}