Extrinsic 3335-1

{
  "heartbeat": {
    "blockNumber": 3334,
    "sessionIndex": 55,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xbcfe603ea22b64f039a407876f168db4ff43198e5004fc36d98c65dc0885d3427157d9985956c2193d826050017a1703df634f0012e784f4ff1c5a15d2881b86"
}