{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578231820",
    "entityType": "User",
    "nonce": "0x4c514c8a6687159609d9537adac7fb7c11cf965c25cd26ec3cc947bba50a5263",
    "signature": "0x7a79c953e5cb981e035835f44d3b414bb88736563f32883d78c2ddab5817383b5047a0cafb0bd14acf1af1e96cb1d89b319e0c9a67abfaf0f79b3a08795c5a501b",
    "signer": "0x90FD14E5f569756111EE3AECbcE1AAb95c2A01da",
    "userId": "86867162"
  }
}