{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631966065",
    "entityType": "Track",
    "nonce": "0x77a7abafb5df6fedb2956f5a8b6a5430e3f623faadc1cb780a7c033f71f6fc2f",
    "signature": "0xee04e8895821b00ffdcda6be576eeaa4d1fc7923e7c2aef802f6328e30ae93ad5326ea0b3a6fa38d76be2c80872c5049ff0fa5acbe933e031b7838c8e0bba04a1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}