{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001767023",
    "entityType": "Track",
    "nonce": "0xc7e21775a1cd91c66329704c19a5eefd6fd401b93cd3f2f743b36b8f08090117",
    "signature": "0xbdc9b902dfd96b508f3dc93b134c581e93d368797b09b0f6a40e37ad7c72c9ae57f61f9cb9990bb81e5f76236d2a03fb50b4fa7d38cc063c58a4a32baa9d65801b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}