{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108078",
    "entityType": "Track",
    "nonce": "0x61cef092459d6fa614843e1b5fae566d17b3087deae0aaf786665e699085827b",
    "signature": "0xf1dad244b2ead1c13dbcd7a8f4648f90d334afd141308366472eb52610f782fb43e4ce8bf9fefb82c8a2bb63baaeb37dd494fec7cac4554507236bb4d9a6a2e71c",
    "signer": "0x530f2862b64D7F94ba042E7fC8c5Ff900C6af464",
    "userId": "607516634"
  }
}