{
  "manageEntity": {
    "action": "Save",
    "entityId": "294180225",
    "entityType": "Track",
    "nonce": "0xdf49f3ded11c61eff725cfd53cc3fd5f3eedc48b4b5bb2b9374be37d34698c9c",
    "signature": "0x32ddf90ce97678a415a6120748659b632d232767ebfd9d2236cb66469054a5bf0d1e8796cd4ac2e5f74618da66a813ee72aeaea0b375d97d1b627ead077023c51b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}