{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x078ab67b0312be309a3b92baf17d7c0ee1e1fe724069240c5f80f0a30be89871",
    "signature": "0x60caa0b3c9eac73bfae705b1ead90baa2b484e10fe9d9cae5245d1e7ee759bf206f28eb116ddfeb07746bc1655cd58f3207029f648ddae06cf1641961f41a01c1c",
    "signer": "0x73EC7Ff9D0A38b4ec5ea3d4Bd2BB426A6B4CF512",
    "userId": "612810516"
  }
}