{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe2107891ca756d00462bd52a601e3d65b0f5e98156c9746c35238c151d738e9",
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    "signer": "0xdB18Dd74b37b66C00bF43E57F7d4139e3Bbea523",
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}