{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7c78843b88459f7cd06257be916cb51e2e4599d7d9f4b907bbf0d02a673c4fc6",
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    "signer": "0x0fAb1DEd74AdA49263035d144D767a18487d5216",
    "userId": "376644752"
  }
}