{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0x37eeedf69f6c81cc74c5961a51d7350373f1267c807efdaadbabb17297d0c527",
    "signature": "0xfcd7f3ca85499bc5d786c45b82ff7b8a5fa6a2c3cc1c76a5dbfacc15c51bbc562dfb847cfb3c69367b8b6211ba429dda5a8415a9b62f54e98dbb7d8a827b15101b",
    "signer": "0xC90e14007305577f04e5F4f5542B2191bB2c7394",
    "userId": "1856608"
  }
}