Extrinsic 1693-1

{
  "heartbeat": {
    "blockNumber": 1689,
    "sessionIndex": 28,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x143ae34f065f5427d5db5a30568540f6b0549d4f9a9e0339b275eaa39dd5db2565f8d16653f23a2a15db6db77649f5ce77c7f3f9212be325eb95a8b42d64278c"
}