{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020641928",
    "entityType": "Track",
    "nonce": "0x3b6d21b8e6c3ed9dad0cfaa245a4689b2108110c1bebef1665805924d047410d",
    "signature": "0xb7fa5cdacd30ce9f9dcbf1dd37ec7d7c504bdeb54251490c1f5ea6556bb6503c4d4ab5164ec7eac580ba5ff41ed050eb8b7399bb2749aeac3f07fd11cc748f1c1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}