{
  "manageEntity": {
    "action": "Save",
    "entityId": "1693617568",
    "entityType": "Track",
    "nonce": "0x52b1c75c9870d922ddbf910b6c48862955ed6da8c5d8892ffc670b69c85ce16d",
    "signature": "0xa0fc76f08b62b6ca141875bd797fa794a4eb9591727cc9542b34eddce2257f29177276a52481b340276fdb16fcc2f7f1033fc92835858263542430f34c9b83031c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}