{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379270147",
    "entityType": "Track",
    "nonce": "0x817b7ca01b3a12edb2a36a1ec1c6e97a60943abbd3ee32603ce70942e666656e",
    "signature": "0xa2fc6f9a264b7b54ac1c008016dfae81cde32f271cf747f3710bc1db1ff323b9196420fa873396164a5058a74612b8e20577f6c3b5c81028a047c4524c61bfdd1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}