{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f9f0abfbdf8377cd20f47a6ede8d81808e99366a268474c4fdf48ef73a764dc",
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    "signer": "0xbDC018Ed0705D31c254d709B0d7e72E5b4B9BfE0",
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}