{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778779",
    "entityType": "User",
    "nonce": "0x3a0f4cbde0b0bc7da9283c970777683fc482fedb4a7c396f36fc2d3cc361b70a",
    "signature": "0x66702d24e7a9f1d13ea94c37f5dc6e64cde122c8365fe597e4a95d2dfc3827963634ddc36d3071182c1675250838cc506f7949453e20446568dd26b8242fe29e1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}