{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9508e0129fd52539314bd6e7ccf918c861873646743f73a997c36a90dc2350e1",
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    "signer": "0x981318F4D2dEaD9899eEb12Da4cfA8E69C96e3cc",
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  }
}