{
  "manageEntity": {
    "action": "Save",
    "entityId": "562704238",
    "entityType": "Track",
    "nonce": "0x64b7006809b47f96b3fb238717f833563485ac9f3962a856b4331538598c1f40",
    "signature": "0x65812f06012b962a22481ca7120abf0b4625c442344d78a0d79cc218a8c600d92fe46e70b7d642e7609e672765b5051f325fc19e93c46320b34eaa3a8d9945d21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}