{
  "manageEntity": {
    "action": "Save",
    "entityId": "169585680",
    "entityType": "Track",
    "nonce": "0x082bff66c7f993efc1d74c9bdcb9fc96e5c0e5896252b27e068907caafc47287",
    "signature": "0x07e7e21149829aef54024d5c005544d35804b2cb3138b4f033a9c91c4afeb5b739b6ff6cc4893134abf22da0e9ed9fd77f951831a5372b6406f2d72a2bec6d331c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}