{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c85b84cd5208763a8b157c37fdc08934b6807b1120860ed40d68b13abb788eb",
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    "signer": "0x595bDD2E3786fb0D66fc6822871d5F62A3f20d14",
    "userId": "539330245"
  }
}