{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x87a3e1301cb86578437c358c2eb11dba932105373b965dd78b87b8d3b380fd7b",
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    "signer": "0x2648F01Fe19B8B1A4536b147beE183028875bB73",
    "userId": "954072419"
  }
}