{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x504d2602daddebcbf58936b1ad93efd8d14fcd481b4679693dd5835198f525c0",
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    "signer": "0xfcB5d37bDeA4716e40E3bd1EdF50954f92abBc40",
    "userId": "909856104"
  }
}