{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3cd412b597d01a1b63eb3cb48e97b71a0ce14d1d4a939a1fdb4356cb71e3035",
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    "signer": "0xe84DAA2a7c71dCb83b533DaC2B3861299D9943cd",
    "userId": "870459809"
  }
}