{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541329732",
    "entityType": "Track",
    "nonce": "0xcb276bdf4ae5acfa703463a584c1c31699c80b6516e195adae89119c9de1861a",
    "signature": "0xf6111fd4905717ac2cb08f95fd3c6a84fd56ba52a5f66361d4cd31d69c74c5c7474c455e8f4cbdec2b38cab8df4b7dcd253d5641b8a0a1692500c4be3dfcf82f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}