Extrinsic 76399-1

{
  "heartbeat": {
    "blockNumber": 76397,
    "sessionIndex": 1273,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x34a2aa1c0b4f689b91ef25c0b4422641fef31f489a25e228c548aa8cb6a07619ee1eef6e72d36d7a56d574fb3122d83677d35057915224eb1cd71dce3e43cb89"
}