{
  "manageEntity": {
    "action": "Save",
    "entityId": "47144",
    "entityType": "Track",
    "nonce": "0x5fc8f88f27608e0484d6f4cf38952e55bf2c13bb2c19e59ce7bd03bf81053b6c",
    "signature": "0x5c23c471e555e7159aa01eee11a6efd9352e944a39951f43047983eeffcd4689018598ffe5dc4c8d876042e99f16164186f38dd72af43f68c92382a3ad6da06e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}