{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c2aab5be677b8178439a53b239ef0cbc36b114700688831896835703454107c",
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    "signer": "0x615A557E62EFfD4950805ab48294945D82593241",
    "userId": "974110018"
  }
}