{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "639689916",
    "entityType": "User",
    "nonce": "0x7e197694eae281bfa5b39a2f31da6d24be06b722c088e69552d33466e4ce4d7e",
    "signature": "0x270baaf32bb7701af9f02060665ced6ad40b03c2dd7ed4a0ee1ac3decf2c783f7986ef7e5ecf2bd10811c32a7322d3792bccf6b066a636f5cb770380850af6921c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}