{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0ac70a986d407ac4cdfc3611adf78a15384371443049d50949b7f22be2dc40ee",
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    "signer": "0x2b8D92f48C5333a5517611C1D85d64517F01Be85",
    "userId": "52707343"
  }
}