{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1654916",
    "entityType": "User",
    "nonce": "0x2533c0bf559db76f4e61d37368a7925a8ca9f0cf7b302ee14eb1548515e06445",
    "signature": "0xdd3e64d53a4b438d7d4d0cf4e9d97a6b1409775d7f9074266f052ecd6678bd0d11eba9509782884350257ae2a7e5e9e8bfa3bcbe2dd276c39a55edb8c7e150381b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}