{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16919",
    "entityType": "User",
    "nonce": "0xfbce18b3f9068e39621d2b206182504b3f0f1d6d76884178d771008a9f3abd42",
    "signature": "0x42cfa474d334ef3d55ba6fc3af88e0a372ca4638f27ab92bc1e987b5089a3c69453986d15357d2c942cf099b22a306a51124f58cf24ffeabfba95ab98ff95f5f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}