Extrinsic 12679-1

{
  "heartbeat": {
    "blockNumber": 12678,
    "sessionIndex": 211,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xbe4d21aabaac9d6c0324961f8144f32c540477666e7f425623f3f6753746f9229e7abe25832d59d503841937299dde55860f15aab4e46de788ffe0c7fb53e48c"
}