{
  "manageEntity": {
    "action": "Update",
    "entityId": "564211609",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9ffc04ec8705b0f3303ffd999b942e43c8eda799c5f936e60b77a8f4cb4b6983",
    "signature": "0x661a9837c34ceecb5a461fe35e4f3738f0d50342b3118ecd499c294c33e921f97e700d48cc21329b8571e0c2bb296ffc71f6b2d6aa4635e7a8ca46a6e65a6d471c",
    "signer": "0xE60E759A9F8Cd424a8C526810b53C8C164CeBd3B",
    "userId": "564211609"
  }
}