{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9176b6daa87bb30eb3a42a38b874c14cffff73e5bf420505d9ab0493951e9467",
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    "signer": "0x7fB5583bE868841A3432399E5727D0A9c7FCF65b",
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}