{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640566478",
    "entityType": "User",
    "nonce": "0xe39879b85270d04766ed0a68432aeea7c66b38840d5456e091a13c972920d3ea",
    "signature": "0x7c58c45236a43dcbbcdd17757d8a4d22e2839284ecc2cbfd00f68a830e01bd9614af495d97fc1076dc325279ff8b1c55ffe551e0fc7e7bcc543a6c2e0e0e9c011b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}