{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4619242b50d2041394f6f1c939c8b82c5fb06abc0125e082a1578b842e37fb2b",
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    "signer": "0x64EE74012185c8814FEd0413566875D29A83eB96",
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}