{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92fb4e493b0953fe324910bc98cdb0f934cdfa536f3b8dc8a29175405806c855",
    "signature": "0x4d27303c13e49fa56cf91d6cc86ae1b7d580da2d045fc95d04be190cc4e48490457d347ce92402cec4662beb34df0f719b5297af311afda74453a6570a84841e1b",
    "signer": "0x82A6C57bC07108331398267471508266e9e7afe6",
    "userId": "406538127"
  }
}