Extrinsic 45289-1

{
  "heartbeat": {
    "blockNumber": 45287,
    "sessionIndex": 754,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x4ceb2ff72ec5521feb01dfd1e491fed254fee19b78f042943c65fd5ec4f6c03bb11d80fc5ded28dbca05119b4074938118fee911cd0a5f00fac3a4160ed5ae8c"
}