{
  "manageEntity": {
    "action": "Save",
    "entityId": "463383756",
    "entityType": "Track",
    "nonce": "0xaa095af0781f5956ae2480bdfd072d2d33b6c4f0431dd95706a364f9038d593f",
    "signature": "0xa53fa12f9fe8a6fb9dd3e1d1599e64786b7fa3eeebd5a1c2658ffe91edd4d5c2210408b539c66e2b0afca608eabb7bb516f6597773f8deec861e917adedea16b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}