{
  "manageEntity": {
    "action": "Save",
    "entityId": "516014",
    "entityType": "Track",
    "nonce": "0xd79f9b8a2f977074192bf756513c4288f24804ea5146f414537f63d9fb708743",
    "signature": "0x6ed43c1d7f0d51f71c9f2c219247e566ae52f2fd58d4090d286dcfdaa51201a1794eee0ae8f209fd198f81088b5e86e769c0f464c2a399bd78b5f0f3269cb4871b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}