{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2b856ec21a2b3ce76cd7dda170de60c45dee38d521b1ad6553bef5da2de7fe4",
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    "signer": "0xDA68466fAcEEF91A1Adf697Fd6efce0a5C951f54",
    "userId": "114204398"
  }
}