Extrinsic 13510-1

{
  "heartbeat": {
    "blockNumber": 13508,
    "sessionIndex": 225,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb2b716b22316798971fb05de3ba6d53f1dfca25dba58563bdfdffa6b36a1426b9b28826c50eaed085d41da2d235264d2958b96093b26a7a716fa4d6d378f568e"
}