{
  "manageEntity": {
    "action": "Save",
    "entityId": "598706332",
    "entityType": "Track",
    "nonce": "0x57ac3ab57805adf27bd4d630cd991b4e2142a1c2f508d2ceb9f84997a6efdff8",
    "signature": "0x5230205d3606f9c05aeae5074f550536ad016767464a4c2aa708b61bdb5db7f46ee41679877bf1af918d8674063ba57aca09b28c21c12753e35bd1011c906cba1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}