{
  "manageEntity": {
    "action": "Save",
    "entityId": "225925227",
    "entityType": "Track",
    "nonce": "0x47381211683f4e158726b473a217ccc1170e163238905954bb5f46e693adcbe3",
    "signature": "0x551d7a39281f730ebb867697a5178ad99e4c11af9d0973dcf60b7f5a55b5a69b13f1511434a0cc5fb035aa086e2e7959762d1e2b9efc22281e87f3fb722b6b8d1b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}