{
  "manageEntity": {
    "action": "Save",
    "entityId": "39199456",
    "entityType": "Track",
    "nonce": "0x8223d0de2a3853bd2dabbe87c2c71319845638dddab679780d4fe7dfe4301240",
    "signature": "0xac164d711b19a51021402c93fa6ea51ffb2daac648f5c2df6558895c37a0daa36f70047bf61ed75620727e8a4e462db0e8f03e961539c64f1c4fc018374427fc1c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}