{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9248e5ad7caba3b2f18d1f5348f41d8d08546ea1e787a31f66e740815abca6f4",
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    "signer": "0x1350Fb660d27De7Af2914fd50cf0baBF74553150",
    "userId": "789409949"
  }
}