{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ca9eab9b82a6c86e608dc273cebcb2218717566b656228416f0d44100dda263",
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    "signer": "0xA6A22A670AE072B9E536b3f5450c5817bB3Eab81",
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}