Extrinsic 17313-1

{
  "heartbeat": {
    "blockNumber": 17312,
    "sessionIndex": 288,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x6efe1c854423b0510402c7db0799d317e323de8a153d517e6357018a61f5aa58bc0011be214f3fdc2bd888db3caf11b6ee5050b32561fdf39a3d655513e2da86"
}