{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777189588",
    "entityType": "Track",
    "nonce": "0x655d623852f14365a125f1a0d02e940b002d239f33a4492ee26fa917ad2371e0",
    "signature": "0xeb8475a20054863277bbcb77ef4874bdde8be78537c37e90a26f4739a475b28914cfa0676ae47f17b711e43c29c883cac62fc7601892898497d9056bcc50ff951c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}