{
  "manageEntity": {
    "action": "Save",
    "entityId": "766577471",
    "entityType": "Track",
    "nonce": "0xac003c2ee5e5777dce3c89f8992d800a93a098213dac968a7be6978e6e19a123",
    "signature": "0x3c3b32558097f7260842c8d870487e59083923f213dccabf43f9d0a113ab115d5e671e804d8df7fc8bdbe9dd5a169a29d63b1905c1d910dcd876d23e65732e9e1c",
    "signer": "0xC1896EAF7ae2431A08647A163291b5a8A0cd2a6C",
    "userId": "185209372"
  }
}