{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x042567038694da28e5e81425c1c5ea1d6663dbc954a8239e3d48a6b34e37bf1b",
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    "signer": "0x5d989a5ED8c868bFA60af2C69406572f8F79b587",
    "userId": "821479447"
  }
}