{
  "manageEntity": {
    "action": "Save",
    "entityId": "156394777",
    "entityType": "Track",
    "nonce": "0xac3cb05e28a666cf3a17fe0865e6b19d37b5bb5fd3225f5f3c19e73032e26084",
    "signature": "0xca4b15ed66fc1e64aa81c727396100e320fb3561968a62121d1e38f0018c0dc009529a50f315086725ac56e4f2fcfb32be43ab0f8a123945692805acf954d68c1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}