{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63058431cc28ccc2d8fd6f272d5d84e66670fb1c9a56ed67ab8c911b182bbeee",
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    "signer": "0x05fC7F397A0Ef264c87B851B5C0E4336dEFaD23f",
    "userId": "483595670"
  }
}