{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358506400",
    "entityType": "Track",
    "nonce": "0xdd94d134338ca17bae19307057795cd65cd536e7f929cc3ee388e0f1068790e8",
    "signature": "0xfdb7277931739b799b40599abc522f610b28f382f4b14f4b99d3149fdd0857c63fd932381a6191154d6f23c53316701317a8c68ebab04d35204ad249947e5d5e1b",
    "signer": "0x94072C091E5edAf7bbccf2aC8257a1590541a307",
    "userId": "987917854"
  }
}