{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "490478463",
    "entityType": "User",
    "nonce": "0x17f168f145796c13473746a0843f1757048cb5c88e8f533641ba5d54f0d86462",
    "signature": "0x211436a4572a37bb52ad0b4d4faf99f65ee9380a6e5c7f990e987242e08518d1661b8ab6a7a8e6308f0fd55fda179512d6149ce4ebaa0be9807350f7c06753c51c",
    "signer": "0x0fd7D56eC9517Ace401083F2C8A4e671aAD50bd8",
    "userId": "549022539"
  }
}