{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb7ac9dd194ccc931376baa72b47014d04251a6864c0918cf3bfa1f6acf297e34",
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    "signer": "0x6dC6fF5eA5461e5c55F78c88AFd9DF528eaa4Ca7",
    "userId": "881439571"
  }
}