{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "10449019",
    "entityType": "User",
    "nonce": "0xe77aeb9fa812e8d4b1e84a27b97e0df6058f961364a96ab9c1541dcd856f21b9",
    "signature": "0xfff57c2d227f146d407b910493bca2ad78993ec26a5e1be51e4aa578f13fb1163a8c6b89e2e3a27ceb929b9ad1c77c34d14104fec931d5fb9cfd112be9d6d09c1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}