{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "661101608",
    "entityType": "User",
    "nonce": "0x7f0cd651b2d7952a11d35c0fd5d3938d3655ffe131313bd93c271f7a346278c9",
    "signature": "0x834264b17427111ed0da908337774094af87bd2c783166157e27235b1c64b54e1cce739f131a97b7c5fce63bc64f1d8a117ccf0f0d9fdcece8138d2d4c5cae001b",
    "signer": "0x7Dc5480547abF67B7926d1c24AaB5d7BE7e0c965",
    "userId": "727950503"
  }
}