{
  "manageEntity": {
    "action": "Save",
    "entityId": "68646230",
    "entityType": "Track",
    "nonce": "0xc263c3b09559a56447558dc75ce055a579f8e4762b232e0c246b7a7f336a886e",
    "signature": "0xb6a90e907e0b26676ebbc8beea964611d68dd38971b21e964fe34ca178d67db45565641f168d32fbf085aab005cc36a8a0fe792fb697ba29610a5b75c51c87e71b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}