{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511404238",
    "entityType": "Track",
    "nonce": "0x975765e9ae7b25b27c4a36e327c582d04a0326b9e0478a6024a7feb5f0925fa5",
    "signature": "0x8e3ae24385d8f762acbda6fbf3c9309666d923d740b7a4f09788163e125ce29e3f265a6a822f9d3e1c1c5f97ce370d175dc10a1b74f5dcdd109b726763563ea61b",
    "signer": "0xF0A43a6d85E63622517c207D4e5d4C137fedC152",
    "userId": "440602277"
  }
}