{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938537610",
    "entityType": "Track",
    "nonce": "0x449d8d08a63df1002c1b58afc792224c8885ce2e329086f698639469fca54308",
    "signature": "0xcc731abef4f404cb63b68f7a8e381e386f84a58af42f9fe1c8d839472ae4a2471985b16b0fd00bc9e95e1deeaca591ef34834fee1b5b9cc23cfda420cbc5b2001b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}