{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778507",
    "entityType": "User",
    "nonce": "0xe6d6adb3b10c6d22d43feda0573a1739d7d5a05ba667d3f57a2ed264c25c12af",
    "signature": "0x4809d2f118585aacc1f8eafdfd9c3007592cca0a7a837616b6bc36e6ec37517b7e1a60dcf9b769abc7ef3555c8c189fd0f4df32f184c7b7f226c35314d0b4e151b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}