{
  "manageEntity": {
    "action": "Save",
    "entityId": "2012970094",
    "entityType": "Track",
    "nonce": "0xd7e028d02a0a0c7fbcababd93f08715de29afbce2f42adad19818c60def71a71",
    "signature": "0x22806b6818465c6147597915c4b70bc4661e8c0d7cfda9722db89a95f9d4bba54fa700df53431bef1e94d0984f1e3054f1b5565722cbd41b2e2233544bb7d34a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}