{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc00456805c4228c7edf4da2ce7786be79192a4d465040abfb2a0ea1ca8a64139",
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    "signer": "0x453b81E8d5891F9B543FF079D4A5DFE20ef61F1c",
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}