{
  "manageEntity": {
    "action": "Save",
    "entityId": "369532164",
    "entityType": "Track",
    "nonce": "0x82f79bd0403a5018bbd685201410762605c333ada1a9ca2a50a2f5a4f1ec66ec",
    "signature": "0x4fe88126b1a64aed205f5f1b136c647136bf1b1e010563e7582f7714d4f5cb3e194fc4794a3f3ece0e9ff9e41a26e671f025af16cf4135ce69209b28b9d2fcdd1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}