Extrinsic 3686-1

{
  "heartbeat": {
    "blockNumber": 3685,
    "sessionIndex": 61,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5cee437279bfbeb3706046467a0f6735dfdddbc206e5d519fce59e88de1eea7b7277f8251fc428c98f4d390520f97dd55352cab63df372e8f39392e9e708dc83"
}