{
  "manageEntity": {
    "action": "Save",
    "entityId": "222444",
    "entityType": "Track",
    "nonce": "0xfa6bba155b298fcc1acb4046d6b44b0af26ce7ffc59b7ba96261f4addb90465b",
    "signature": "0xac1081c57b5b025eabf19865afbfa481ab6d1c6999c7c4118c9a86a2c53cd74e6a1c8583616fddf21628dff97b861f254ef9c32047e573061c1f17f1884fa2561c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}