{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x989baada5278dbb2e088ba2801d3bf20cdcf7bc73b3ac5dbc46e8597a88844d3",
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    "signer": "0x7b8621A65C6FD0422223367A535BB694317A7cda",
    "userId": "648959487"
  }
}