{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0x2e89a6bb8f3fa28a352b2e7f62be27df9ee7d1769d5c8793b6c05a07c386b7b3",
    "signature": "0x36300d8c57015e3d8d38732b8ddb11886489c1e7d6dad8b5b366abb5a6dba1d13e8fe357d8f773a2643857f14022df9a1ab776dc6fe4dc230121ff695b2fd8e91b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}