{
  "manageEntity": {
    "action": "Save",
    "entityId": "685754559",
    "entityType": "Track",
    "nonce": "0x72a951e00e6b7fe625e63236e17d489259c7e7dbfec188f84e3bdcf282123d42",
    "signature": "0xa15454577f4a6910da61af341d001f161285cb733395f8bc4c0d53880ee20c9e7ad48de30d75588efc1945d66725df3d5c927ad1087de595fb517149fbbb6fc61c",
    "signer": "0x8c3542f22a26D26464E0294cd0E41239308213f7",
    "userId": "826451106"
  }
}