{
  "manageEntity": {
    "action": "Save",
    "entityId": "591156155",
    "entityType": "Track",
    "nonce": "0x84f08200dc015868b62a531c642594fc66417daedba927da3e2623b9effda5de",
    "signature": "0x55092d8b4ab8043e4bb99f37106626fab6b6972de9b92c719e7dcdc05f4e43fb030d1135251d67ff9f33eb4775960467382e494e2abfcf04dc0c8017815afa8d1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}