Extrinsic 48641-2

{
  "heartbeat": {
    "blockNumber": 48639,
    "sessionIndex": 810,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x42dfcf9e8775ce998c244b82ff5ded573d839ba8a47fedcbe95da35b4d39b134865e7961706ce998642ccf88330c1539e2dd4c18cd0571ec624f24a6930d5c84"
}