{
  "manageEntity": {
    "action": "Update",
    "entityId": "506981614",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x14200aed3175148fa423593f380550b1ff5b40a091bf161d2a217890841fad8d",
    "signature": "0xa23f4ac807741979a9487fa1a6121a93df3010c2a6fb7fb06bcb1c4bf78c21250562eebf481cdb2819c0a3144847722bd3f0eb7bd0775d48a326d911e46cc3251c",
    "signer": "0x8AdF47d2120990458685806F5f08f4A0439315e9",
    "userId": "506981614"
  }
}