{
  "manageEntity": {
    "action": "Save",
    "entityId": "544576",
    "entityType": "Track",
    "nonce": "0x608687475326c6dfec86ecacdb29f408e9a54e27783bbc34ff92e6247679e6ce",
    "signature": "0x258c53ee7a50f8499c704ff6591e3584ea29ebb422be915d4d611d4276200cfe30a8a7fa2b690ccd66f76a16dddd5820feaa897179406a6d13830a7445c60b7b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}