{
  "manageEntity": {
    "action": "Update",
    "entityId": "573816074",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7357d9cb3568c12f512bb8e4fa9223ffddab426a058ecefcf5f9ad7f7f82459c",
    "signature": "0x295ac21232ce32b4aee21386136ea5590c380cb944d8f99b0d8b5d930223ca2d52bab7cae1a2eec0be6d7b429fd1b3047f69f4ca15866d0b6b9b0cf3840092901b",
    "signer": "0x4F4b84cCCf69D82A17a0f5b174FB3fc59d165Da8",
    "userId": "573816074"
  }
}