{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895032017",
    "entityType": "Track",
    "nonce": "0xb837fbf610e19995d3a68b133ccc7711061a74322bdc7a2fbce2acc1e4268f76",
    "signature": "0x80356b92969a930f4f3410272b2d7f61fd121638dafd2afdf82f47b790ebbb4e6052f5ea949bc5c0e9751d024b4a8c743e04c0f206aff1f4df4f5f745cb85f6d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}