{
  "manageEntity": {
    "action": "Save",
    "entityId": "802949",
    "entityType": "Track",
    "nonce": "0x037ee798e6f560a9614462f411f4ad86ffc33278a6c103836fe86c7bb0d50416",
    "signature": "0x55f9ee2249cba10385f02bcf7383f60b1711bb143565f310dfc426109cbe976d54c8c519291179fc517e19eaa69c737bc55af427ae0a42a655d1ab8459b72f741b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}