{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x567f9925d2cef25f0e93a0587b93097cf36ac67735142f634394e34a59b018d0",
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    "signer": "0x1F5220C8bfa79e3E809a9F1513D077b26ea168b2",
    "userId": "115324862"
  }
}