Extrinsic 19609-1

{
  "heartbeat": {
    "blockNumber": 19607,
    "sessionIndex": 326,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x3a877ad7928bbb51ae4ef5fd488858b08bc72cde0230749051dd964112951e16b2223cce0cae31f7f5dec8f816f7f3445d32ddd024785c308e9ff4b3e86ab381"
}