{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "305012325",
    "entityType": "User",
    "nonce": "0xfe4108bf2da092436dd54dc195332d5063555bb673d4fa0ed2796a22392ff95e",
    "signature": "0x7bc632530e8cc94dde6ef9d520f74dfc5cc6395042b28eec5d7262ae74cc875256221eeedc2b060945b5d9ebbca6b56e6e8a8c8c4b71e8d2e1b0faa71863e3aa1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}