{
  "manageEntity": {
    "action": "Save",
    "entityId": "1877569464",
    "entityType": "Track",
    "nonce": "0xa0223a750b4a598c6cb66a7b7b94e11ef4ae47c8364e1efab50c3b105c020680",
    "signature": "0xf2ac1d35f2912197f5a8a1a40afb2d79d99aa26b8b9c9e2344aee7001b487f340320c4fa2cfaa718f11c876577d39a4ee9fd24260be8cd4658e83a6eb73491831b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}