{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "612948467",
    "entityType": "User",
    "nonce": "0xe8cf948edb2560859968bfbb6ccd569ec137e86d8c35a435344e7a4e2e4b8b55",
    "signature": "0xa75460de1347dad1fd7aedf2dcc85645f9d77d529225eba8f5c96985641c60901720f9dbeec4045e51f0e258e026616aa2cb3d28aa8277d980a811a5bc3b80671c",
    "signer": "0x2b012Ef37cb9315271f0AC801DBbec07c0D4578d",
    "userId": "506789556"
  }
}