{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6398",
    "entityType": "User",
    "nonce": "0xca76e297b637fa3078efd610b2d9e088caf0a7a0961df6bf2c425a8d1816e0f8",
    "signature": "0x2c1ce73512200c8ac47955d6de2632a3a41e7766d8d2b16c57e5c28e4bd2ffb17859fe4ce5eb21fc4512f3c26f3deea5ee25b2413ff56779ab0565abb0d7df601c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}