{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "503297687",
    "entityType": "User",
    "nonce": "0xfbd656b6521b2b4585f4991b316c7fba16ad337eb4f97f220511079fc8f27a06",
    "signature": "0x9f8c249af19996f0cc6398b735ea23b347e4ce8ee4ad7e2b3f11d953a7730e372f46df063255db06ab890bc9584d53e9f81794c903daeefff464747d0194ec6a1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}