{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a97294ad0db5022bb92cacb5dd768af5a4406461f89fa97f01b68e8089fe867",
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    "signer": "0x18cb7436d75dc17251E18a4A58451F227FBD800f",
    "userId": "460533913"
  }
}