{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb6de5bb5bfa2cf50dfcfd6b83041c0b171d1ff650a35666e99c043e0167dc9e9",
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    "signer": "0x6AD8A511f55a98F773afb33eC22747a76AD9c2D6",
    "userId": "915337571"
  }
}