{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaa4326ce57dbd5451c1bb03d222f3b7ee90c4cb367401259b74ee76153f0397d",
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    "signer": "0xbd53D7aEb5Be588Ec9b08Ee50f3B446ea209a4c7",
    "userId": "923183897"
  }
}