{
  "manageEntity": {
    "action": "Save",
    "entityId": "432462",
    "entityType": "Track",
    "nonce": "0x8d4b70d6d6dd4af637096f309fb1cc55a5e41373acc853fbf98b76e2a8dad4b9",
    "signature": "0x05b27c214c3261a41b8e00209348143fc9dfb5b67df1379adb277e5f861b6043742738f1d17efeddf6afdb4aae7bbf850248395ce56dde7a8805727c187a5f271c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}