{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c325e59e9197a89b559e22f8385084d7e6e3e88ec01f5b2dc11780b4aaab679",
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    "signer": "0xA51cC50F9a1d4398ceb06Ff234CC00D28A4a47A3",
    "userId": "614762481"
  }
}