{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "833905522",
    "entityType": "User",
    "nonce": "0xabbc17d415d8cc72c9a2b463ea02e3a1be17a680f649bd37781a58727d3b3cba",
    "signature": "0xf6cbff3440257e50dc528567e01414c901bbaeca0311153613ac8b09538c35c4543f7e88d7a83e76cf942aeedb0b45a6abcb23a6a169280b8c489f28c74572a31b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}