Extrinsic 701-1

{
  "heartbeat": {
    "blockNumber": 700,
    "sessionIndex": 11,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0abfc1344755adb6811fc0f3d503bd3372f018f5de9f2c5ad895bc976d23184b1e607386382e34d87b7805f59072e66c5384d0254cbb61bb7867cad12b7dd886"
}