Extrinsic 48521-1

{
  "heartbeat": {
    "blockNumber": 48520,
    "sessionIndex": 808,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0809d889c563706bf9daa752a49007bc4107f8151dc4fd07845edbaffb1444731c28dc9dabd53ea9d375a71162a87c871360c500becf40955e914fd466e28d85"
}