{
  "manageEntity": {
    "action": "Save",
    "entityId": "309360513",
    "entityType": "Track",
    "nonce": "0xcea02d72de9e710bc25e95558839d79bab3f7fa6ab6a643fc48824e1362184c2",
    "signature": "0x7ef96af475c915cbba9685c8874ab780da1be545fbb4be97d2a5b099f14d506c7feb81b8ae47db2298237ded4f8f3e9b62c167e9b99b0b757c2590390fc260a11b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}