{
  "manageEntity": {
    "action": "Save",
    "entityId": "1679393330",
    "entityType": "Track",
    "nonce": "0x8b43b710f9b4e6ca460bb4a33e5a26ba90c47beecb4ec14eb57b05a53004bbda",
    "signature": "0x500cf6b2c632e0589aeae19690db19a1508af97e7951196f71fdee12187e8c5f315f73bdae32dec1ade91c1ec3c94abddc3bbf407ecad314d144c8e9834c85961b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}