{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x83d2492a23e63f47781caa503e89d4891768b58ab8bd13d6bafe405e66e1fc0e",
    "signature": "0x773e2c6b793d4b83dd4e48960f1b7d6302ba303d176f83ed6e7f454b485128e3647f8d83b7ff2693a5de97b1dedf1a67b59aa2f5ca7a3e39a2fbad7e834d4b731b",
    "signer": "0x4a4E686a6442e2Fc2495a7d4363B25c583Ea3c3a",
    "userId": "34815"
  }
}