{
  "manageEntity": {
    "action": "Save",
    "entityId": "658561200",
    "entityType": "Track",
    "nonce": "0x0de926294d02bb6e2ce24e9375dfb3127f926072fadfd3eb933135ca2512dd16",
    "signature": "0xff10bf43f42064cbda3450919d8af8c0a2a1c592d33dde2125c425136d98fc9d4e33e77a235ad91e38bb8bfc332957c7a492afd822ce1a3134aac7c581bc6a141b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}