{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359713203",
    "entityType": "Track",
    "nonce": "0xf720098b63752ac604f3a6cd9ffc3b858fd23c80f5cbd63f981642ba564a6a23",
    "signature": "0xed057638f527db8a6ca38aef1d78a65bcc9a5402869faaf2d861513c313ad79b4c8d1a9dcc95786ec79822eff88945a5578a6cde66b9a5dcfed63a8cefe3fa881b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}