{
  "manageEntity": {
    "action": "Update",
    "entityId": "524590012",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdefbd71024388b8b8ddef594976db5a8452d441f5cb8fd06acde0234af01f287",
    "signature": "0xc8d70d177fc5c377de44302517a2c41d3962c09e45c40f8ee80ed9389fa71912785f0c94e321237a148ae0977a74f1ad19ceb46f9821907680c9b81ffef50b4e1b",
    "signer": "0x878510CB0c61D96b6a56128f7c3f30516f239902",
    "userId": "524590012"
  }
}