{
  "manageEntity": {
    "action": "Save",
    "entityId": "2023887460",
    "entityType": "Track",
    "nonce": "0x1ec5053f23c651254970bd8f793f4d531f621fa2a97633bc691e0d591687a1a8",
    "signature": "0xfad37db3ed82e91bc594111156ccb120b7554796e9ae069517c17ab9772dd1413ce3d86cc13fa5fa2c22055525910aac80045135ffc0a6081b31852754a699161b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}