{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "342990",
    "entityType": "User",
    "nonce": "0x1abffa2be81c615dc95c56d99eb1007b12e912d6cc485ad04ce9a1029b15c317",
    "signature": "0x2b643315f332c5b9ca4c88451eec447791d71a06b66800dcfccb68cd8e7136564a76fbdbe1dccdc703e24096c5dd250d082e56fe1aab8aa4738f9a1556e417ff1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}