{
  "manageEntity": {
    "action": "Save",
    "entityId": "1767162581",
    "entityType": "Track",
    "nonce": "0x3bed1db36f11a52c05171bf5166a608fd327bfe44ec177af094c107c8bda39ce",
    "signature": "0x16bfb7faaffd54d83c51cebf3ab939a0f9f5f952e1813cd9dd3378ab0c91d9cb68d89fcd2b0a28f47ab5f42d3fb40524075a5dd06ad20463f8793d4f7a7124231b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}