{
  "manageEntity": {
    "action": "Save",
    "entityId": "1411404145",
    "entityType": "Track",
    "nonce": "0x4a986c208849682b373ef88fca58e77bd32efb3dd55564b42683223389aec645",
    "signature": "0xaa82838b2c5d46da3b15bff71e1e10a05e868b51b595d441ae3f4912f95d6ec36a280c890faa0dd0f70ff0c623ee33ef90cade2617a04c096ecfa667ea62e9c21c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}