{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121201250",
    "entityType": "User",
    "nonce": "0x5dd75f9cee4f96ed0d254841962c84842384763f92b90dbfc45bf4b6b60dce09",
    "signature": "0xe85d7f6e5b7fea206da4bbdb56547b9c771c72c6953afb685575d33788fc2da524be3fb18498aefe9ca16fea8f2c75f692405954104b7629032286261977b6651c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}