{
  "manageEntity": {
    "action": "Save",
    "entityId": "374523332",
    "entityType": "Track",
    "nonce": "0x679704dc719c58063b7238a9c439572a17ba6bd769cc31aab89d35c81badc98c",
    "signature": "0xb29e0055f1be3f0753f1d69437542fc8ae30d57349cf7dbb005f737eeb57dd9e0c0055750cd4fc9715e5e3d5ab251aafd51b9f9ad1646eaf01a5a65e03fba1e91c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}