{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cf9feea35ddb2a87d18a852e32aa848f65664898861fd327a719a31482571ad",
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    "signer": "0x1Cb865DdBA351F970220F715B0aC633F06fe38f7",
    "userId": "953308750"
  }
}