Extrinsic 31242-1

{
  "heartbeat": {
    "blockNumber": 31240,
    "sessionIndex": 520,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x14643143c808eac5c25a29fe666fe7c2930dd00c7f69679c4bfe1272aafce36145869e8826b093808e8498ad031394187af4e259bf0f5eab1f4656f5bac40285"
}