{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301493",
    "entityType": "User",
    "nonce": "0xe556e1a646e083a031696cd1d87e593678a6496ba318ee3de1e956724248735e",
    "signature": "0xbb3adb8afed3721314292eb2ea6c903dd2cce4550d224296a15889da1d6fcf430be0efcbe1d86d9775fba20f77ab301c84a72ad9d97882bd5913ea11f6a256bd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}