{
  "manageEntity": {
    "action": "Save",
    "entityId": "53938",
    "entityType": "Track",
    "nonce": "0xfae6e1f3c4f65be0c0cd3b261b731db1a03ce75b5fa8df22148f784199b9ff2c",
    "signature": "0xb73b5e4e0dd13a6323ddc67b4ac123b4e165c28d60f6201c7c3cdb0b73fc83955a031fa00411f1ae68250617a3bab9e5da3ba2c130f01ce6412fcc0a891d3a3d1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}