Extrinsic 189377-1

{
  "heartbeat": {
    "blockNumber": 189375,
    "sessionIndex": 3156,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc84c51bd9dba420a7efd42678e47961264759c286c26e5054de6124c74b7e22db084c43cdb063099c9cc6995c286b2ac754f2beaa2319d71494dd34d62ce898a"
}