{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663987141",
    "entityType": "User",
    "nonce": "0x6990dc8a5fea6e6f31ff071757933f82446a6c171a1f450c0392f46fa9bb714f",
    "signature": "0x929c4bcefd991cf8a9f951d0250d6220612278a2d6b64c2c0f46b0b356f8f92a29c02c6116322b24b0dccc91cf730a215fc36df3040978e509a11507d1cdbe081b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}