{
  "manageEntity": {
    "action": "Save",
    "entityId": "267881",
    "entityType": "Track",
    "nonce": "0x8457e56745333649ffc51b088bb580c2731871ad6d6f2ef841f54d0424f7cb88",
    "signature": "0x6c0d116ba8042655ea9d722b2284b7554dd41f75b90d5ae7997dd27878a85b546fc6a24b90738b213e6147f5713f78ffb45c205201a710b438a15f90a36fdd4e1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}