{
  "manageEntity": {
    "action": "Update",
    "entityId": "488742999",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7123a02123dcad6844894c1c947a510f66c0d299eee86f9f020a8a0301c91fd5",
    "signature": "0x76ac9113086ceda68d4814b133b543324b474648f845f6fbebfc39c0cb0e844b5fe58c424e88a2f40388cf480108b0bf90ee47c92972bc39faff6c2b55d6af931c",
    "signer": "0x4E9AdEAFEc83438bD9F729f649244bFec8Ca2D94",
    "userId": "488742999"
  }
}