{
  "manageEntity": {
    "action": "Save",
    "entityId": "68465999",
    "entityType": "Track",
    "nonce": "0x1513c533520bf29d24c4d6c13d38009782ba39b326acd2d5a770da95c8a70907",
    "signature": "0x27db3b16bfd9d497ebf1b610b3d616d53151efd4bc2e4dae7ab1dc09ebea5d2040da2383eb1bea113ada4ceb5544fd113fcc8943c370e972d3e936ba2cb77fac1c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}