{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcd95f0a91f6e3b136cd49b29d9544278ec50fb3cd8cc266610189f9de4f116df",
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    "signer": "0x847d23265FCDC782e4C22a7089cD5b8896A75374",
    "userId": "145264625"
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}