{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca65189a4062aa8177bf77e34a0c4d4d5fc14fab929299120f9f7395b2166380",
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    "signer": "0xAc4De539c09b783C54D1688b282a73ecEd414513",
    "userId": "613879875"
  }
}