{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe46b1c2abdb38187920dfbec60d04249b3681d8beaa3ceccaff826d4def5843",
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    "signer": "0x155f105eE610aa5605bf8F9a405ab2716147dDd5",
    "userId": "18330982"
  }
}