{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xa40c0527d259c3d69a458280c36170a997fe1bbb8a3c6905a87acffa4903d90a",
    "signature": "0x8039f49e887b0f3cdd24c37bd8c2b41df35a8f381807a48f737e57da1fd9c35f4c6ba1c1bdcb96fc30bf4d3307262037b3560c97a46ac754a6a0df7509b3be7a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}