{
  "manageEntity": {
    "action": "Save",
    "entityId": "954473",
    "entityType": "Track",
    "nonce": "0xb914d452369500b1ee6d4d5706300d4e690e2c34043f0087b855dae10bb8fc8c",
    "signature": "0x5607ecbfbe40f81bab2f4a604dd8c936c2adf9a92a0dcd90c8dcf6dba23a12ca0bada167b0564c462da78722a5245d6af0d78f80bab90121039884d38231b64f1b",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}