{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2723",
    "entityType": "User",
    "nonce": "0xc8492b5bc5f888de43dd61d37a13613ed3ccfd16d073b73bb70c6ad688773bef",
    "signature": "0xfbd339b5f2961aff6478db19142bb257370bf4f6e08cf24e817bb6bbcddd5c150c31f6dd633140b9a2052ec977e868c4958f025c68ce2a39df3724fee924c0591b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}