{
  "manageEntity": {
    "action": "Save",
    "entityId": "2024531975",
    "entityType": "Track",
    "nonce": "0xbe15e0b85a34a3ad03d5b4ef1f3a611423af9e567de3295ee239fd53fdd34976",
    "signature": "0xc1c8bba6a8f4bcf49fcd1be3f9a41afcf3b834e7e06ecf1b9e119346e1bfd9dd1cab3a31a6803e64d48dcf7d8b4cc9a5a01179847a77b426724e8034f18448081b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}