{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x73a447db5e344ca51a6cebe79d39e1e7a8b2bca968ee4de1e8ea712d57586f2b",
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    "signer": "0x380e2B026A85789C37e15BC0833b18B9e0cA63Ff",
    "userId": "361209907"
  }
}