{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346921521",
    "entityType": "Track",
    "nonce": "0x174549cf255da0aff5e6e931ae45fdfe5f4fba58ba18650256054fd077b77297",
    "signature": "0x3f56515e51bfde6f746de918a0712ef7d1af3c3d5b0b201eefe9af7eb48089ca7b34309dbd016df767e470ae11bf5fe4728025ded27e96fc64d88d53344fbf5c1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}