{
  "manageEntity": {
    "action": "Save",
    "entityId": "2026820689",
    "entityType": "Track",
    "nonce": "0x110e1a18bb4c229f7c20f350780e9e4267115e6452b4048554169c2582b1d686",
    "signature": "0x3f1533e7f6015bdc480a8314297fa7049c9441549aaf8de17b22ca0a0eb42de173027c9f5b6c02abff54255147cd0e4cb15ccbb7f4e073a3de53391580971def1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}