Extrinsic 398955-1

{
  "heartbeat": {
    "blockNumber": 398954,
    "sessionIndex": 6649,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x942409cabd3318bd0b5e899d64ea531731235e871731f20e4cf3bbc539257f096da6eb44da8d66ab4891d2e828f33e65fd634808b54d85d5847abd594223a88e"
}