{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0xa32eaca1b9f0572122ca64d5063cd363a4acb9fd7daaaf50dd96c1b5d582617e",
    "signature": "0x6d48a417f1e70b350ad5ad910afd6581f70b7da366f94fc43771b77ad6e3492121bf6b53b1451eb6f6919a94571d7eec815195aec41922bfa99b9ce97b0f8a3f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}