{
  "manageEntity": {
    "action": "Save",
    "entityId": "169106",
    "entityType": "Track",
    "nonce": "0x6bed4982bdb2e713c084e931d299bb4d608e44a4d6feced87a8c5668ed098bee",
    "signature": "0x5159c53210c84c5a87ba2bc7c737978131adc20d040a2b445791615c3ec64750289f2133166df90617d376aeaf12525d985ecbcfcc467fbca6991e5267014fe51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}