{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788560850",
    "entityType": "Track",
    "nonce": "0xaca3375a293829981ca6b5c65f3af34f936ac6f39602c65f143c7c1c90545823",
    "signature": "0x87425e2c11cf53dbd77ca8b3c8447805ea769fc9b15e5ba8301c23e38827660e118567f61b33e5436f9085ab6056cb88fa9f1054e0ec4e9dd8034fd66c5b19681c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}