Extrinsic 37123-1

{
  "heartbeat": {
    "blockNumber": 37121,
    "sessionIndex": 618,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x0684ce912bdf805e0fe257020f65bdd518412ad464060c0065166445a9c47f07099d43509fb7ce8319cf2e4bf04136f48a9be560e864478b1d34008e1f96118c"
}