{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "393509866",
    "entityType": "User",
    "nonce": "0x879a34eb3ca33e4e29f3ccc942d05192f58349a0af7d0b3241c4a2da8e1e4715",
    "signature": "0x3e149be76aa451e8c726507bf1e4cd369fb5a68c6d6a9736950a006de0aa83760e2bcbe9d204d6649db95a9c62016343720dc9f9b22f561e4662aeb07c2c08901b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}