Extrinsic 7415-1

{
  "heartbeat": {
    "blockNumber": 7413,
    "sessionIndex": 123,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8ec271ef259fea882fae9c081528b3a4e35daf77dcebc3ee552a1afa101fab67f1e37474cc92ccd78de4e52bf9467b0476d4af559f7d8c5183af2b622e876f85"
}