Extrinsic 27288-1

{
  "heartbeat": {
    "blockNumber": 27286,
    "sessionIndex": 454,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x2a3f59bc2500273c41e866ea07847ff38fdb1f4ac40fbfb9c0fa290f426a527d53f02a0d3bdc04e3e2d7d36a67c1a67104377f673ea2e0de80e366cbd666b28c"
}