Extrinsic 13122-1

{
  "heartbeat": {
    "blockNumber": 13120,
    "sessionIndex": 218,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x84dfa05562e3a9457f4d56a8d1390489c39c115822de47591541f6f7585b0304319fb804b2335b93b1a605e12193a4884912c09f5c1386cc8dbdc3e1782dd286"
}