{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe436205b4ce78fd1527500f569312b9025c144eeaf132400f6797d918e86dc82",
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    "signer": "0x53639592DD4244c9335f99791AC9F8665F25d65d",
    "userId": "609513018"
  }
}