{
  "manageEntity": {
    "action": "Save",
    "entityId": "625442622",
    "entityType": "Track",
    "nonce": "0x27c1e6886295b9ec7af815af847b77b9ad5c310c527e293af7925dfa7fc28e9d",
    "signature": "0x0aec6d43a5ddf50b4beb66a6e3cae4020fc31aa1ed77741e33c7606b7123da9f0ddc37ea1e55e08390550a7973cabe8d9fa91b5cf55af30169f9718200e3074f1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}