{
  "manageEntity": {
    "action": "Save",
    "entityId": "516523",
    "entityType": "Track",
    "nonce": "0x2ef94a19bfa646dc087abee34f544fe25f6b83a0e947b8917edbad8c51b3387b",
    "signature": "0xe0b006dd5f096ae612a36d5dc8cc209d75a6afb312a3eb46b1b843f936fe73e513aacd5c52756e5728dd85098fb422aa3b40c6ab3efe317b16dce9f08859141a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}