{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x50af7452aabdcc670d228ff9f0624b3492ee2c8d5d19766c3b8be2dfcb16361b",
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    "signer": "0x030204c18e5923d8CAb041D245E7b85E4dAc2003",
    "userId": "626007525"
  }
}