{
  "manageEntity": {
    "action": "Save",
    "entityId": "181882295",
    "entityType": "Track",
    "nonce": "0x7f76740bec5abd255fdfc915066f15b7dd4322cbf5c45cdec78137365a494a66",
    "signature": "0x107929abf18140de49cbbdf0a39db539ebd4e76d887a013dcc0f72cbd816223d4a9945bd07f15d522c289fcfe3704f743216f9811f38d9a716dc54c44e25126b1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}