{
  "manageEntity": {
    "action": "Save",
    "entityId": "923597636",
    "entityType": "Track",
    "nonce": "0xaa597d8120298955aa6012b7dc104ab2cfcbef8327e296d51eda2b072e74132f",
    "signature": "0x207d9965890aa69a816fd8b51b3db2c2c56dc0be181e53fd3a8412e2eabae94d54f06ad37a7edf236fd86a0a0defde0ca4b2dd8ee1eae90028c56705b28082c31c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}