{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb2937910b8af0f93833e939513812a087551d7a951a7962fcf4075ed293b85d4",
    "signature": "0x226adf153b214a1f50aa87ca53981685cd2a3222e79568b545ab74dcee380f217fca9335e24d3deeab44e031084105e105b5b69df742776b10e93475748eaf251c",
    "signer": "0x4290D2F0496995616D979DD2F9f5dAAd15e8A198",
    "userId": "629355871"
  }
}