{
  "manageEntity": {
    "action": "Save",
    "entityId": "303233680",
    "entityType": "Track",
    "nonce": "0x487f41bb7d37cc8db0287c49b5f0420573f9eae449db76509277b275af5f9a61",
    "signature": "0x3c2a08f5479c4e4fcb1575791baa5b2aa8bd4ea56ffece1b05f7e925bbd4f0241c92419531e9331e6c430c8cdac2e13e574e9410fc87fb946b143f422e9912831c",
    "signer": "0x720537125Aa4b451266209E0d508D7576a4bAF94",
    "userId": "942771296"
  }
}