{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "991877005",
    "entityType": "User",
    "nonce": "0x4d16826000eb3d59b33d19f1f6c4e466c709254749dec79f2881780b2f519915",
    "signature": "0x4bae63a28b4e9a0bbb9b9cb53e817c1ebec99ed3892959ab929f19517c223b0805e0fa56222709c7584437ccbb08d7b46ffb67ff6d104b21e114bd9f841d0eb31b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}