{
  "manageEntity": {
    "action": "Save",
    "entityId": "410811",
    "entityType": "Track",
    "nonce": "0xb92b96d3da42fc3c278155b8eb2b45970cf1df3e589adec2bba72d7c9fc95928",
    "signature": "0xef0028ca3d242425718d6eadea14be41a5b929f60e2b601f905f6ac920ed51237fb64851f4c84359a0d4bbd7b583037c330de27de3d956ba867f64c1f732cc0c1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}