{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x06d028036be63b497d4fefa7be3cb2cbbde9550242b5358821d6c5a6038aec13",
    "signature": "0x4fe90096e9fb1dc99c050a62187161ea199393b5ecdae5c078228e574bd88c026436a81d606244db8e12cba198515baca3a195727faef9352ff21d56918756601c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}