{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020114371",
    "entityType": "Track",
    "nonce": "0x230c1251e8cee0257a5c06f4dc957afdb4a28a08c8f5366e2b752e2fe6b86f08",
    "signature": "0x6ea78e22cc5c1ba8661da950510992c292fc4275c029238b46312fd7be539170566443a4ce5b928aa776552d7f6d0cd9079e7457632dedcf22d7d7f8e6349f0d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}