{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x867d0e2d0421fb1a6f93f6105d71a2a6b564494b3c8ba10659a310ae641c3a42",
    "signature": "0x861c20a917065c93eceafb05ad3709a1f3436677089186504fffbf72a5f61e6e358b48c5df8f3d0d88c7248ff36aaa461be69322286e48fa7680e7b9a38848961b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}