{
  "manageEntity": {
    "action": "Save",
    "entityId": "240634274",
    "entityType": "Track",
    "nonce": "0xbef1fa84234823531b6a9980285a465cd08c10c3ddceae308681e7f7963f18f0",
    "signature": "0xeb6db1ffceab61bd12a7e6efda9b3c3a87893bdaedcaa2f0c2a7a1c9a78fc1c4106595f633ceeeeb4d6a87e66ae645cda6ca0d3cd29eb7c503a75d71356c1e801b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}