Extrinsic 2735-2

{
  "heartbeat": {
    "blockNumber": 2733,
    "sessionIndex": 45,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x528984aad9273e553d222c7dd38c1fe16ac1d21b6f49d9889253d19cbd19a849cff45461d2356b97ff0d4e8c63f6936b1f3f8dd569dae23de6593defd0399d83"
}