{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896389841",
    "entityType": "Track",
    "nonce": "0xb3ee961ba274c5e49fcb66f6a4bc651b5d1ec06e484657eaac0fd0bcfec9d815",
    "signature": "0x813fc0c85c9084723a3a26589e74f7580227e4bb28300cd6e6e455eef97b2b4d26f8be82da7a4e708ee14677f6fc9615184b185a4f6e9dce1445b4573be727f11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}