{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "738673571",
    "entityType": "User",
    "nonce": "0x799b8a7cfcde144c687660704bc3324ff22a021f594ef4c9d6363aaab71bbcc9",
    "signature": "0xe4aa03b626a6b38270d4c70ef4dae9d6c76916fd93666cfc7b91fa78e8e03f0d64caab39ce6ac689886152b7bd70fbe38f38e4e4279abb44c0971c270d359b751c",
    "signer": "0x18e80443A33c763307bac21D4Ec54B381DFC58cA",
    "userId": "964025330"
  }
}