{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441255971",
    "entityType": "Track",
    "nonce": "0x240db68beebb0144f8846d1517b9455cab5f59fa2daaf7f3551d2e8c678d4892",
    "signature": "0x2227ce300ca4d98db0e334a75273a8ceda9d61197f678f8bc98dc12729434fa836ea6da0dd2577f0e1e6c95225ce34acc58d271706cbb1b5609fecb1c8436cd21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}