{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a96b18fee63f5c3f2b5fc6c0def189414322ccb3ddc903db8cf623cdffd6e22",
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    "signer": "0xca7ED35Ea6226B62ef9998B36bcD0519E7822ab5",
    "userId": "413318698"
  }
}