{
  "manageEntity": {
    "action": "Save",
    "entityId": "800590485",
    "entityType": "Track",
    "nonce": "0x7bd6ea775e483918c8c1988e328b1a42254daa9d7830489002488c4e65bb9acd",
    "signature": "0xc540a888ed08fef45bd0820b876f663960a06788c33b84e8a4712c48f58ab34042c3f89614442a64fc480f0e3eb7b3d87c0dfb269e73b00f2c12db27fa85a0a11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}