{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044720",
    "entityType": "Track",
    "nonce": "0x1043cf9d321e86f984871581629026848e453000ce30c8139d2116bd4ba2d991",
    "signature": "0x0797b7daf1ad5a0a9ff99beb727ab34877db4e58d6593357e8a6e8a8625ae98d6fe91db098d49b138bc860f7ae14c0273d870a8bd2f8402d4948411e31c8694d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}