{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940326434",
    "entityType": "Track",
    "nonce": "0x88223f7e6b96457cb187b10460cc94996021d5c3c7a4fbe8093640264b3b9ff6",
    "signature": "0x60d9a50d6379b1de216d4a1598ed1da2a15a4b6037da6f0205203ff288b3cd6d10686faa731b80f8aae93720dd15045c96bf45fc8edde9e0a1f3626f1ee567f91c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}