{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x84d9a2b62d33f00a969e32a71a52d21e81e80ab86c059f957132b88e3b3f8feb",
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    "signer": "0xEAfF078D789Ca3fed26f9554FCfF4b85228b712E",
    "userId": "283212119"
  }
}