Extrinsic 15348-1

{
  "heartbeat": {
    "blockNumber": 15346,
    "sessionIndex": 255,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa89c27c1d958b48bf5480a6c1dd4a60914fbecddf85a84bcc65949bc78f299133b39458ae41f2ed913c24a45564c45d58c2d1bb5d1af8d7bcb13e0818212a289"
}