{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044057622",
    "entityType": "Track",
    "nonce": "1793075326866483499",
    "signature": "0x74f9990463b30b6d3bbf7f88d66a4f356f2ed1447cd3da5ad17cabbbf9ecb24961ffcdb8b45237338e01c84716a4cb5b225b6a0b7feeb2581dfe802c887c395c1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}