Extrinsic 19668-1

{
  "heartbeat": {
    "blockNumber": 19667,
    "sessionIndex": 327,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x0a7b316825433989e5215b021e7554a698078b56edd48a9a18fd56abde4f3c4605937f8d83c8ccf141e20de319d3c98b40dce3aabe9df4f0a984e81a41b98589"
}