{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0621cf5bd40d3ef6a74d9e8483c0461529c3da611789b5bf30f3597865de4bf7",
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    "signer": "0x543eBb69529118a88245331feFE7D7a07629967E",
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}