{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x619f2fa5003bdf431f989bad2113630c3d13aec015991c87207a751638f115f7",
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    "signer": "0xBe9B6f5cb472cCcDCEFf1f823a3Ec32D93CcF9C1",
    "userId": "944117628"
  }
}