{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c0c37169c44cf0dc72b8b4db48b64f5cdbedb05ef9bea081c9c790a986cedbb",
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    "signer": "0xf987600Dcfa922FAA7E2a89669A71a87275fcab9",
    "userId": "67144750"
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}