{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x01781cdad9b08ab355e1584b038205582587806c8de8ff13bdc9d42c357ccd43",
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    "signer": "0x9B2D4b4FdCEf78AE84eB6231636C391cE298970a",
    "userId": "664883546"
  }
}