{
  "manageEntity": {
    "action": "Save",
    "entityId": "347303046",
    "entityType": "Track",
    "nonce": "0xbe469c236b025421c437a594888e5fb1b8c9a5f5fc06fc56182d26c3be434e5d",
    "signature": "0x2746b53a7a038dcd670b2c316cc380dd86e81a2bc29a3d82c60b21a719ba614d561629a622da276941917f9579143d910be0e82628aca7bae9f181c91c7a99fb1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}