{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345543522",
    "entityType": "Track",
    "nonce": "0xd05504a4aad62ad56caba055bbef49271c06ad53fb5dec4d3b60624442b0012e",
    "signature": "0x5f0edf3df235a35fd7ac5d83d2edde325cbd6f05994aa9785b65cec4be3b14d4267ed1629b53c55fd14aed39842682c70e89b95b31b1d507fa4bde1860f3e4dd1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}