{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1c4a55ce569ee764f7d68f1934d0d5e0b9eddf553ba3db4f0a8ec0dbe840ca86",
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    "signer": "0x3ccaEFA4fFb59D7da3DBD0fBD2DF87d68C818813",
    "userId": "423544032"
  }
}