{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907863297",
    "entityType": "Track",
    "nonce": "0x6c2cd9202e96d356fd9e4feb5951ed74d1f640698e605d64d897ddc7ce30a1aa",
    "signature": "0xe92ecf8173519a98a6a9909b4c2bd57b742721e1e005d96f7c211b98aab21ab14ffcd842b04ea81352e471c38b863490be51c74c4ab913cae5ae15205b30925d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}