{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614368087",
    "entityType": "Track",
    "nonce": "0xa0fa82a75396e4f55022ad384a765af924c45a825bd3dad8967d28793cabb00b",
    "signature": "0x415beb0cd99aa8c12f6c78932b6b0ae7c5fe7128662a5e43c7e6d71a415220db093be9db12053c71a1908730b88c4ac14d8498b387b890ff21eefd40d0b2301d1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}