{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "764",
    "entityType": "User",
    "nonce": "0xf53859ac05193c6ad972361a8077dc9f74e05ddc29097bdebd5030e81634eeaf",
    "signature": "0xf3b9572ee29efa2bdb6ecb9a2a4d290f2d52db94bb5aab9c75b9f82f5ee0906f4cec2c04ac724f6e3b82d67435f64bd6ee25f636cdb9c40b3b6f108bc638f3d01c",
    "signer": "0x44577d90A171E208f723dEEa39019067c9Dd87E8",
    "userId": "853591809"
  }
}