Extrinsic 150400-1

{
  "heartbeat": {
    "blockNumber": 150399,
    "sessionIndex": 2506,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc2d0078803eba2be6fbe64b7faa9148846d0a2c5d366f3b0eb787d920a9f175b901594d0523cb450d69eb67232d4c913e23d55e01e990e35544b84da14917480"
}