{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1a4e5464bd1fed231975443bef23aca95fd1862ebf6397912a93223668a1dd26",
    "signature": "0xd8e25dbe5b4b9fbf10f0b5ee62cf8293b28f0cedd519dd49ef430ad47be2cb50602331682ba3d4a4f71855f7e06d4716257f6d6821d22258060b4b8e1b114a4a1c",
    "signer": "0x3c44A0B830a5f2086aFEEd6A0D0C7F032445AAe2",
    "userId": "609699779"
  }
}