{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda38d872d9d74c58be747b4868d740e782c2adeb1ca3af0abb86b2dc15903aea",
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    "signer": "0x838c3a5d208187e094325179bad85fd0912673A1",
    "userId": "20400094"
  }
}