{
  "manageEntity": {
    "action": "Save",
    "entityId": "678171082",
    "entityType": "Track",
    "nonce": "0x7b99f39ecc64de334de79f7645108a2664c987bbdde5b1af777b0392a4818162",
    "signature": "0xc74e7b9c292c91ba9f896d5c0613edeec1ad80df56ebc7ed681fba33fa6520fd451747a3fa6dd2a87a681a27162fb0b1f62f1e57e8612c6149c10dc61e8365a61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}