{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104086335",
    "entityType": "Track",
    "nonce": "0xb1412c30f69a117cbd93dd4a46a8d7269073c67866dbc420c9211de4edd079b3",
    "signature": "0xad4bd34e45f5f334cde66f13bef76a770729781c7110a246612d7e7210aa185d291a1e99a96107df1a9072d3bf41c5e9f0894814a9d504f86597ca4a89e9e1881c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}