{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2bfbe54956659d03c8dd524eadc58007195f7387d1c7ad0d79e3c8779091f3ca",
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    "signer": "0xF8CE7aFa6c75Cc913a4a6FD983a9282107A368ae",
    "userId": "625220598"
  }
}