{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0dc4f45399aed74865fcc7fa9292f96ac8509ba812f86ac361e203f2a518f6ca",
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    "signer": "0x3c10dc6a6eF8931cDDeDCe8e2d0a65733B503596",
    "userId": "934433265"
  }
}