{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa28a4f9bd51580f8f92ec8f257607243cdb27e8891b208d5d8326427f1492a13",
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    "signer": "0xec4b6570ac61163674EEA8E53Eafa5033E82Bb41",
    "userId": "676704231"
  }
}