{
  "manageEntity": {
    "action": "Update",
    "entityId": "542976645",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe631acd95f546686bbb87becd3dbdb11d003a4824cc7a7995fa6dba7dcbe3e0a",
    "signature": "0x855bb538bd59179ee70bf6961f2771ea6701c6a29753b65acc0e333572191fb76cf93c8c63412ef0e437a0da5f21256f69813035e38de0ce5aba2203567a6dab1b",
    "signer": "0x184c452b7ebdE50d4A3C2C19A223C813b3F12758",
    "userId": "542976645"
  }
}