{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118785307",
    "entityType": "Track",
    "nonce": "0x6e194c7babc9fb750b5bb2bf332612452f7e1b326a62cbb1ac33b0945ed7d013",
    "signature": "0x848ca5f707d8b9478a0c11ee71616a05b0ee053affebf6d23ac5d3e5fa33919605e0595fe451f2850abae5b4c23180cda26699ffb5d8617f280ba6b7df00b8e71c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}