{
  "manageEntity": {
    "action": "Save",
    "entityId": "480210",
    "entityType": "Track",
    "nonce": "0xaddc3aab9b0b8c442a4b3724918e0ac13efa737f5cb8ab793a63d1ce5bf67a56",
    "signature": "0x938a94eb2a180a234d077894d9252695ade4601e744cf03d19a5732a1c4c8efd64cea55b45407c9df9a0026196bf917dcf28b634336df42df034bd3ffb63370c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}