Extrinsic 13175-2

{
  "heartbeat": {
    "blockNumber": 13173,
    "sessionIndex": 219,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xfac2d578f104f687110938dfbf0b2372392f59e343c2d64fe08be7a8d8f70e08313b7ccb77eff3c3cbc4a16bd3cb689787bd47514a3bbd6128163de1bdc0808f"
}