{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "438307",
    "entityType": "User",
    "nonce": "0x68f287de7e846d77cce0307327f1a50f783bca24517b96b7652c750a733754a6",
    "signature": "0xbcc6649bec12d57f0480b5c16aef6766806a882a871ffd6842f8dd48509396ea562685c2c0a5b498e60da35a9edc47241e8265b31b764b2da2cdac46aed896b21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}