Extrinsic 7303-1

{
  "heartbeat": {
    "blockNumber": 7301,
    "sessionIndex": 121,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xce0c2146eb4a0846d04f10041e7ae72887cb21276535dba8e2934e510f64d27b407ced26e5d8a89402399d801168ded1ce3b223b67807aa68b3f3123941dff85"
}