{
  "manageEntity": {
    "action": "Save",
    "entityId": "811409",
    "entityType": "Track",
    "nonce": "0x911caff5ad51356934d2954ce15c3debeb1ac9d79cc56ee40d2f4eb548f65ff9",
    "signature": "0x6fe6cf876bb16ae6cd3eaba659302bbecd640d80bc30f2bc9cd17b7981299cf2337255e0ff6b48444f59bca98ace48b40d273fed14fdc589a632235ad5ef59341b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}