{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa26d3779961c1625b546d32a2b4009a4afd71f983273b3ae2ede334c0ff7396c",
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    "signer": "0xefb49f1beeaB8cDfF41663EA36238DE2D469ed67",
    "userId": "833602861"
  }
}