{
  "manageEntity": {
    "action": "Save",
    "entityId": "790348303",
    "entityType": "Track",
    "nonce": "0xff763811515a97cffec1c0936e1a8b079f2983c52fd95193b435de6a2ac840a7",
    "signature": "0xf885c57dbb0f1cacd82708d3a906405c1477aa2a5ab4808f56268463873a12d26195557a8785b44d2054058502264f803e6ab0807f4a53c26fac2838a2dafd001c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}