{
  "manageEntity": {
    "action": "Save",
    "entityId": "165105978",
    "entityType": "Track",
    "nonce": "0x38d02f34a2d402ea9dbfe307ce70f6639e14ba43b70c8a5a18a080ec455eb8b7",
    "signature": "0xa9f1740077024558c04c513fe6963e1e04cd5ae03f29409b821ccd2c862b59df037b7669fe381074c93c9905a8506b1caba2954072b27a33f7848317694c717f1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}