{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6dd91de0d483f183075dd5936ce721e3cabeefd2cfbd0225ce46f492f60b6614",
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    "signer": "0x4582bE7218BF6272417d1F61cA87c4f6d6D7C622",
    "userId": "537052556"
  }
}