Extrinsic 19848-1

{
  "heartbeat": {
    "blockNumber": 19847,
    "sessionIndex": 330,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xca10c1b09390d0f9d0e789dc8362cebc514dad51973be4a77cca975e1b27fa0e11c23c4bc14cb0d39f86f5ac581abcd2e2ebc6d09e51317710cc2c32d78b9c80"
}