{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac30fb59d2da31fdc71ba55fdff20fc3906f25dcac34dd4347e7f8fe1ca530e7",
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    "signer": "0x64F9729C679Bb5C94De3ad988ecc2569757124C8",
    "userId": "440214081"
  }
}