{
  "manageEntity": {
    "action": "Save",
    "entityId": "982236997",
    "entityType": "Track",
    "nonce": "0x6d48aa2a5fedf9e97af4529b46ad25946c4c0d5b07092bb902a2e8f240be12df",
    "signature": "0xe5e9fbefe9c8d4c9577d5fd17bcfdfa52f3f24d5a00a9a251fa7ac5fd8e2f82b633032f9c91c9c99235ead0eea5803ea65c17dff82b0621d4f4508e2880152ec1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}