{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753712",
    "entityType": "User",
    "nonce": "0x77f7c0340b5f15fa98e9cf2cfd0e93b29432a5a4c99fb259630ec7a1a9f30958",
    "signature": "0xc347c1c9b22a660c6655015552cb1a27d7df32af8cfdabe3df35a9a8e82d9e280f8bd30a8f1e7bb0d54cf7eab206a510810f7245df13367a73646e55d54282501c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}