{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb361a6542ad0660f8ef750db9a289aec1ee2a9c96a5fa5cc1b2c1a36e4e7c4fe",
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    "signer": "0xfeC67Ad878159a4F2DaAaCbcC968194928EDD306",
    "userId": "812315549"
  }
}