{
  "manageEntity": {
    "action": "Save",
    "entityId": "356323",
    "entityType": "Track",
    "nonce": "0x3dad7d106118d659e74378f7df195feffb6fd87dcff1bc9523c6a5c59802edd5",
    "signature": "0x9cdb9466f156638dd30c85387fb8fd4859fca9b30e3fff4765518d967961535477410a3e1303ed73002518a14808c057d4d84c4fbcf3977c9d1fcd448a389ee61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}