{
  "manageEntity": {
    "action": "Save",
    "entityId": "260634611",
    "entityType": "Track",
    "nonce": "0xeff036e6137fad46be3b4785495d512c0eb895a4f33b76ef892dcf47b50e8c20",
    "signature": "0x0aac4f2755e77d6bc892ef742f70e980d42d2e5ba0a84afa9bb2f9bf8566a95e18b3a2aa0aa84fb2f39c3426719cca5bb6c62ff050d678f3df88c9c71fcf5d871c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}