Extrinsic 39327-1

{
  "heartbeat": {
    "blockNumber": 39326,
    "sessionIndex": 655,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x2491c21f603e7c16281945a294ee86080e751be55147bef3b7f75fa1780202288ad7ba1ef419171abea266ab0ae0d9513e976952a1f3b97952994374e4a39d83"
}