Extrinsic 23721-1

{
  "heartbeat": {
    "blockNumber": 23719,
    "sessionIndex": 395,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xaa6c2f768402ad073827f873a44d5ab941f17e6f3d05c95c47b9bcacf7e99121e8593b468a4520c318ca0682e4b0e352f29dc3a841c5a3334f3ba2ae71c7f981"
}