{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x64ec4b78de1f404c5d539e26923069cc0c814c6fa2ce407e0c1297951d38e82d",
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    "signer": "0xDB26a8F439E622a798439FfbC77B3801E3320d59",
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  }
}