{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "499534190",
    "entityType": "User",
    "nonce": "0x171a61c9ac1108bfdcda19319c92b4e76e0a381242122055b9debc432ca1114f",
    "signature": "0xc673aedb19a8a9e77a1e83dd031b89f88b8fb0ae7ad74c6f7bf2617dd7bca2536b2ae57f0775cc33a7ad1679a710606ebf8aec12b1896fa31bd5c1a0cc2280181b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}