Extrinsic 47321-2

{
  "heartbeat": {
    "blockNumber": 47319,
    "sessionIndex": 788,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xa4090773f9efd2f0e38a32e4f055947cc145187a1049ca16a4cf85867cf2744665907d47c6d8e3ff508f1e72876c536d9ccf551c843385d24b0c6f7539226582"
}