{
  "manageEntity": {
    "action": "Save",
    "entityId": "480516979",
    "entityType": "Track",
    "nonce": "0xd502dbba168a13f1310a0568dcde77210a0d383edc124a914ec046b17385482d",
    "signature": "0xeacd86c9c6125751a70095dde6c4b6867391c16d8e9d5a3628ea7baf714f7dcb72bfa4b202403c6f7776235a926c2c72a59522b26c5c6ab280b666fa77856a351b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}