{
  "manageEntity": {
    "action": "Save",
    "entityId": "656170202",
    "entityType": "Track",
    "nonce": "0x6339ada8d999e6e717b480b31559b9e830f5ec367b8744d13893ffe6fb811c1f",
    "signature": "0xe866269db2695eb3ca7b328d9ee2933c0c7b5f4041c5de5265bf41b796ba23533db71d78c61f87ea1ca066ada221a0b2feae2cdbc0dcac4b7adf5c4ea2fdc55f1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}