Extrinsic 38350-1

{
  "heartbeat": {
    "blockNumber": 38348,
    "sessionIndex": 639,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xb025a3d1c6674abdf95d066643b6ebba62b74c7bcc95d684723cae7c41e69d01d4e8a6e435e6fdffbb41761740b500f7d1d9ec1e0cfe8363eb73114296f7858c"
}