{
  "manageEntity": {
    "action": "Save",
    "entityId": "690939",
    "entityType": "Track",
    "nonce": "0x0a958a0a50d77a08a9342eadaeb2063dea9dca634d3b44c081cd7dad33014a63",
    "signature": "0xda2f8b7040922d176a0e398683f85edae18dd2b35cce748e6af30eb4f1d77712433aa3ce8bd65f7403b8ebd4b90bea4d09558433599c30a479141ee741a216cb1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}