{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdb90a03de889196f5c2df64e258ec16e8e55084367029f867215e34ac8828cc5",
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    "signer": "0x9B872C29885f4a39B0706106A8f01F8154D0d8c8",
    "userId": "660577927"
  }
}