{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037475165",
    "entityType": "Track",
    "nonce": "0x00c1c91be34811644f9bf4563fb6e64397da502f8f23cf12671c2a34d81c276b",
    "signature": "0x0e31ccf051821f096ffa09e4964980d80c17395581058da1e07d067d69d5516613157aeed8758c7b0aa313b5375ed6995e80ac82331175de29561c2d4e1494521c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}