{
  "manageEntity": {
    "action": "Save",
    "entityId": "315720210",
    "entityType": "Track",
    "nonce": "0xa3fadf893448870af3122fa8a88b54053b92fec09f70529b87dc1115b0d79696",
    "signature": "0x69403670cd419fbe4036b1175d4e33359c9e0cd3cbe59609e2ff8bdff6790ba56c9d564b4432bacc24a04114cb6d8009a52de56602735ce8c07fc31fb1aa63b91b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}