Extrinsic 3697-1

{
  "heartbeat": {
    "blockNumber": 3696,
    "sessionIndex": 61,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x94cd9401feee7ea62bac4fe58b209463c019df7667071ed0fdf6f1e6534a98789c586f64a4467dca0714e7269cdd9fb68437f8a4179a4fa5424409a0c2360786"
}