{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x83d03b6742083d4f713bc16a8b68d9b03933ff5049aa8c37567963bc217b2699",
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    "signer": "0x47016be5f3059b02b8941f6121cCe9ba3B3dd542",
    "userId": "265874461"
  }
}