{
  "manageEntity": {
    "action": "Save",
    "entityId": "655153",
    "entityType": "Track",
    "nonce": "0xdffc6ffd46e07a93ac1879d8ee6c9752e5559bc8de3f65b1b03e11c16ba29072",
    "signature": "0x9c23ba0bebaed8837728ebd67c0899c02c56978c2095c701893722c3533c025a43be35904f887a5bae22f9b6da0874370f8f996fde467732969f4cb733652e401c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}