{
  "manageEntity": {
    "action": "Update",
    "entityId": "199847019",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5585fdf8eda63e8e4c79f7af00e837b788021ecd0645237ff3dc9b40d9573b97",
    "signature": "0xf89a0aa7e7e918da8657228f506d4fe260863e9bb11fe905fdac78032e15340a312dd1b83d755e70df63e455b3461e5c7b2cc4aa6e10c01b27ddff0d85fbd8d41c",
    "signer": "0xD1ee185A4D0DADa204Be95e503587fA357d65D02",
    "userId": "199847019"
  }
}