{
  "manageEntity": {
    "action": "Save",
    "entityId": "406239",
    "entityType": "Track",
    "nonce": "0xc0ed197be9aa0af4a6bdeaa4a35447ea568ab3ead9e8903a1dfd1f4590e5514f",
    "signature": "0x84201eba07cf274809221782829ec65e81e6e50b41d33e7717811d1bad432f2e1e2f7eee91fd769ad056c38f6519cfeaf952eb49a069c98f6b167aaaf2293f3a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}