{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5500",
    "entityType": "User",
    "nonce": "0xb9958b365d30749a3a818606fee614064bf5ce10e7b5b9092a5046a3304d5ca4",
    "signature": "0x1daeebd2885483f5632442bd02c66c1c0e74fbc51397cf7f64b8b50b0c4aaa6474f65f78ef7c604bc0d8e4f8d8e5a3db46b52dbd3e07bbbc65c4ba0c6942a8ef1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}