{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645720561",
    "entityType": "User",
    "nonce": "0xbe401e503a2b4d64b220cc87a6f1a7c419f02ca77f8e618c497d4d78fca56795",
    "signature": "0x41235273445e11c2060a0118a7bbeb4c9a02eb4acb342428cf2c34b3fc04ebc537e29a67d7963ccc07ef47abb23c560c7a646ff23436ae9ee181ac47ded4ab611b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}