{
  "manageEntity": {
    "action": "Save",
    "entityId": "714684796",
    "entityType": "Track",
    "nonce": "0x4db20c7e1d80a129a7b444277aa91e94b6edcd9c8d2508ccb24fcb70b3062cad",
    "signature": "0x0746aece9545096bdf739a812cc3f91cb69f341f5c033a192266111a5d31a5ef4fb9d296422e8cec624269a9c3a998cd1266337cab331f023784085cad9642f01b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}