{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeed1b0cd4f58bef9b3283d0c23bbf092e023953032774d067a2e4374e64dcc3b",
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    "signer": "0x3b454c37F04119cfca2897Ec632809779ee5Fb35",
    "userId": "610042501"
  }
}