{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398",
    "entityType": "User",
    "nonce": "0x578d7d9f5d0243b8e80b373d7a105ccfc2efac2c3233a7b90c24060430a9524f",
    "signature": "0x68d65a79312ea38fce874889260a0503633c4455566e3bdc2313b1a40813853d362d75bbad8f794a865d0a9d9d9e7a3f8cf481a80f6e8a5356aca7759d1a33731c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}