Extrinsic 154308-1

{
  "heartbeat": {
    "blockNumber": 154307,
    "sessionIndex": 2571,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb642a1a27a4981f3f92e590eb2b0acf03452bd01276d8c8591e84dbd22332820b7f8ec404a76dbcd4ff80508b88fac0e1392fd5819ef2044880576b7f7493b8e"
}