{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378297",
    "entityType": "User",
    "nonce": "0x3ea2702888dacc19da1235a10b415dfe999d4052d686d9f99d847fd8085c3e5f",
    "signature": "0x51aa3a53a5635a11b777236096f13f4baf244fec9935523f4ccbeb530f4560390601440f7a4edfe3cb8bcfb6c907783e28f3c7efbfd10e9fffb8b5f84cd9cc091c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}