{
  "manageEntity": {
    "action": "Save",
    "entityId": "1957891200",
    "entityType": "Track",
    "nonce": "0xdddedff034a38786cd87a080742b67438fb177e57f18e1e3790efba8411c85cc",
    "signature": "0x3a47d2830b48f5f9fd829c59904ca43aa9a678f50a075c11d1f962b766d9925740aa7604edcd43fdb01cd48d50da1bd3946b35615c61a1c55d1686d77d94ee561b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}