{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a46ccb57f06108e0a6a1ccddee8e4733f71e727b334ebc8eea704ffe835ef11",
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    "signer": "0xbe92763E4992F8E84a6E26081B99e19b5f9f6D2f",
    "userId": "231207555"
  }
}