Extrinsic 17982-1

{
  "heartbeat": {
    "blockNumber": 17980,
    "sessionIndex": 299,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x883a8bc3d2cb613bb14dad2a4ca87c739cecfcb2401688d66560e6b88c4f4b415e6ee27f51a4a96ab33ea203a8d6a8e7169249ba83e08091e66e85a4c95a188e"
}