{
  "manageEntity": {
    "action": "Save",
    "entityId": "437366060",
    "entityType": "Track",
    "nonce": "0x25c1d31ea010b1b1ff16b30eb7bdca468d114b777fa55a8b92a1d2213aa59260",
    "signature": "0x8c8bb3bf3e4b0e81fa1e00a15609b3095420ee64d19da1afa97662d73d8ab578364ea52ff68dd9a626fbb85305fefa8cac08d56d886215454e89d1624bccb9671b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}