{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09d4c183c32e8fcd915104c57f7de65deda516fba5bc4760e00d7a91693c8877",
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    "signer": "0x65EA977550F72a2b597FCAD26968ac6D853C2Ee2",
    "userId": "953431020"
  }
}