{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x31f4d8eeeed494eb9be202eb5c867223427ddb679b865936f732072b6af97b85",
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    "signer": "0xe81C5B1ADbd4C603a5fF628Eb679619895D196a9",
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}