{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x77a0f6c3c6ba8843051e974c4da320a7be7c5ad6514b7d9ce2c2acef477d0e12",
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    "signer": "0x6b8CBA667a1288Caa4Eb2f1ABF8e68cBDf4af260",
    "userId": "635245416"
  }
}