{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256992131",
    "entityType": "Track",
    "nonce": "0x2a590194d86648bfce67f91300cafad627e58512d119f12645d03d4f63eb3758",
    "signature": "0x39309d36c40e32ba6dc0ee4688d26ec608e1c39554b93cdb58eb410094f6f8d01c1e32a09a8eb7b999d831dc57032525d1b9b3b8e1e4dbe79b0f9818459145961b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}