{
  "manageEntity": {
    "action": "Save",
    "entityId": "2111904238",
    "entityType": "Track",
    "nonce": "0x7dec115ac5d51771daf46a82e2a20672dec6162da3350d7e79609548b3ef63e0",
    "signature": "0x993cd10edb42bc12fbfe0696e99c223094900fa67226f5eb7e667cba4f4ef70f0e6acfa0eec6c8a7a01fe5b30a61efdcc251aad91207f7095fabc649cafe81741b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}