{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0xe60cbaa6fd97337c20cf45ff87c943ed7df9657905ec511295fe2e41df2f3602",
    "signature": "0xfbfb0b6b1c0f9d6031c8a2b4fad28f8c0f4daf66bbda6b2e37d5edcc11fa8f9e2322d5e94d713365fea1ab0a98a06f017e13b4f5e2fdc322516e3d84f415a8ab1b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}