{
  "manageEntity": {
    "action": "Save",
    "entityId": "682938568",
    "entityType": "Track",
    "nonce": "0x65d97e02e5698e013c7b2ae99ffeb2b5b0de90710c96318b30690ce50306fbf0",
    "signature": "0x506f972d736e8a148bff315d05f60178003b16bdc8461ea9d12b2c3a023b34d94ac8873dda2ceb1dcdfb02a8ed18a3aa90810f453e1430e37b8829ad517ffecc1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}