{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05cd6fcc5a420fb8457a9f007b4ef7a6a0a3017f6a4a9b8e57ea074ad84c1b98",
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    "signer": "0xA5F8D926639c3Ac746B95dB5Ef70CE2a8B4dCD55",
    "userId": "850254795"
  }
}