Extrinsic 12507-1

{
  "heartbeat": {
    "blockNumber": 12506,
    "sessionIndex": 208,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x8a19c4cd0e6ddc5cf879c6446becc6dc9196915aaeefdc0c2c8250be20590125972304c31b2a0dbf36fc3267049f7b7ede9c5cd9abc47b4fdfa2a9aca6b03e8d"
}