Extrinsic 38558-1

{
  "heartbeat": {
    "blockNumber": 38556,
    "sessionIndex": 642,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x80b9dd352cb776e4ea0dfe4783ef1ed4ef5a7195c82fe330616cd4d04c2adc2cfe79cf43b8c82798aac80c19afab11fb0db300517a21579275d74bbaa0ca198f"
}