{
  "manageEntity": {
    "action": "Save",
    "entityId": "814026322",
    "entityType": "Track",
    "nonce": "0x6e2a5ad5f64f80ff15679139c246d3f39734fad94ba903b0ee2e8d6b0d9e7aed",
    "signature": "0xd04a37108a217d5c5dadc0579665f0140b34b11edafa1f7462923844f36eb5a55a699afcd96bb6d3b86054e1dd5e2b53ecd275e4db16e2eb5417af92d13a5fcf1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}