{
  "manageEntity": {
    "action": "Save",
    "entityId": "1957306292",
    "entityType": "Track",
    "nonce": "0xbe28a6221f1264c2b62a3453571192d6104d6d62779dcb61b6302d29a6028635",
    "signature": "0xca366fef559a8f3796d83897452bfdaf24faf7c5252166fe53381d1a19546f1e61709356d1a682f85dafd175b100ff639a5e99f958362f8acc8c7f159d67b6c01b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}