Extrinsic 3942-1

{
  "heartbeat": {
    "blockNumber": 3940,
    "sessionIndex": 65,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6007a5c5cd0e14d9328d97f339800410c7ad8fc5edec08c6832c822243323958a8dcdc73ee6a3ffdd793a2ff915ad97858733861a0799f66859d8a6f103f0f83"
}