Extrinsic 7304-1

{
  "heartbeat": {
    "blockNumber": 7303,
    "sessionIndex": 121,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x30220300ecde5143ca2636f2095933c2c41656ab9dd02ae412c063fb9cf7005b25d222bbe5e08ba26f06fa153b3e898b19acd49ea2332c7f2c2102867c63ba8b"
}