{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098675974",
    "entityType": "Track",
    "nonce": "0x57d928e09a5eeb2130accdfbc5fcd18f555dfd06a1aeaf45fda30a7766313916",
    "signature": "0x8859f13c8cd208e911a4fbdc9999c03db80c70eaeef60ec36609e3dc369db563573a2cb679c01d9d7022d11015dec3cbca7df3e77c2e0384435924744c53ca811c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}